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1.
J Infect Chemother ; 29(10): 988-992, 2023 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-37286133

RESUMO

Blastomycosis is a fungal infectious disease that can occur in both immunocompromised and immunocompetent populations endemic in North America, with no previous reports in Japan. A 26-year-old Japanese female patient with no relevant medical history presented intermittent left back pain and an abnormal shadow in the left upper lung field eight months ago at a local clinic. She was referred to our hospital for further evaluation and treatment. The patient currently lives in Japan, but until two years ago had spent several years in New York, Vermont and California. Chest computed tomography revealed a 30 mm mass with a cavity in the left pulmonary apex. The specimens obtained by transbronchial biopsy showed periodic acid-Schiff stain (PAS)-positive and Grocott-positive yeast-like fungi scattered among the granulomas, with no malignant findings, and the initial pathology did not lead to a definitive diagnosis. She was empirically started on fluconazole because of onset of multiple subcutaneous abscesses and was referred to the Medical Mycology Research Center. Although antibody tests could not diagnose the disease, blastomycosis was suspected based on the pathology of the skin and lung tissue at the Medical Mycology Research Center, and Blastomyces dermatitidis was identified by ITS analysis of the rRNA region. Her symptoms and CT findings gradually improved with fluconazole. We reported the first Japanese case of blastomycosis with pulmonary and cutaneous involvement in Japan. As the number of overseas travelers is expected to continue increasing, we would like to emphasize the importance of travel history interviews and information of blastomycosis.


Assuntos
Blastomicose , Adulto , Feminino , Humanos , Antifúngicos/uso terapêutico , Blastomyces , Blastomicose/diagnóstico , Blastomicose/tratamento farmacológico , Blastomicose/etiologia , Blastomicose/patologia , População do Leste Asiático , Fluconazol/uso terapêutico , América do Norte , Japão , Estados Unidos
2.
Reprod Biomed Online ; 45(4): 763-778, 2022 10.
Artigo em Inglês | MEDLINE | ID: mdl-35945106

RESUMO

Ovarian tissue cryopreservation and subsequent autotransplantation is a successful technique for fertility preservation in oncological patients. However, there are concerns regarding safety, as the graft may contain malignant cells that could lead to the reintroduction of cancer. To circumvent this problem several experimental strategies are being pursued. This systematic review was conducted to provide an overview of the strategies aiming to safely use cryopreserved human ovarian tissue to restore fertility after cancer. Thirty-one studies were included, covering five different experimental strategies: (i) in-vitro maturation of oocytes, (ii) constructing an artificial ovary as a scaffold for reseeding pre-antral follicles, (iii) purging strategies aimed at the eradication of contaminating malignant cells, (iv) maturation of oocytes by xenotransplantation, and (v) stem cell-based oogenesis. These strategies to circumvent the reintroduction of cancer cells through ovarian tissue autotransplantation are being developed, but so far have not reached the stage of clinical trials. Further research is required to establish their risks and effectiveness while the ethical aspects associated with these strategies also need to be discussed. Despite the fact that these experimental procedures are still under development, they might provide safe fertility restoration options for oncological patients in the future.


Assuntos
Preservação da Fertilidade , Neoplasias , Criopreservação/métodos , Feminino , Preservação da Fertilidade/métodos , Humanos , Oócitos/patologia , Oogênese , Ovário/transplante
3.
Hum Reprod ; 36(5): 1296-1309, 2021 04 20.
Artigo em Inglês | MEDLINE | ID: mdl-33394011

RESUMO

STUDY QUESTION: Is there a possibility of reseeding cancer cells potentially present in frozen ovarian tissue from patients with central nervous system (CNS) tumours? SUMMARY ANSWER: Malignancy reseeding in cryopreserved ovarian tissue from 20 patients with CNS tumours was not detected by histology, immunohistochemistry (IHC), molecular biology or xenotransplantation. WHAT IS KNOWN ALREADY: Ovarian metastasis potential has been documented in patients with leukaemia, borderline ovarian tumours, advanced breast cancer and Ewing sarcoma. However, data on the safety of transplanting frozen-thawed ovarian tissue from cancer patients with CNS tumours are still lacking. STUDY DESIGN, SIZE, DURATION: This prospective experimental study was conducted in an academic gynaecology research laboratory using cryopreserved ovarian cortex from 20 patients suffering from CNS tumours. Long-term (5 months) xenografting was performed in immunodeficient mice. PARTICIPANTS/MATERIALS, SETTING, METHODS: Subjects enrolled in the study were suffering from one of six types of CNS tumours including medulloblastoma, ependymoma, primitive neuroectodermal tumours, astrocytoma, glioblastoma and germinoma. The presence of malignant cells was investigated with disease-specific markers for each patient in cryopreserved and xenografted ovarian tissue by histology, IHC via expression of neuron-specific enolase (NSE) and glial fibrillary acidic protein (GFAP), and reverse transcription droplet digital polymerase chain reaction (RT-ddPCR) for quantification of GFAP and ENO2 gene amplification. MAIN RESULTS AND THE ROLE OF CHANCE: Serial sections of cryopreserved and xenografted ovarian tissue from 20 patients showed no malignant cells by histology. All samples were negative for NSE and GFAP, although these neural markers were expressed extensively in the patients' primary tumours. Analysis by RT-ddPCR revealed no cancer cells detected in cryopreserved and xenografted ovarian fragments from subjects with astrocytoma, ependymoma, glioblastoma or medulloblastoma. Taken together, the study found no evidence of malignancy seeding in frozen-thawed and xenotransplanted ovarian tissue from patients affected by CNS cancers. LIMITATIONS, REASONS FOR CAUTION: This analysis cannot guarantee complete elimination of disseminated disease from all cryopreserved ovarian cortex, since we are unable to examine the fragments used for transplantation. WIDER IMPLICATIONS OF THE FINDINGS: This is the first study to be conducted in patients with CNS cancers undergoing ovarian tissue cryopreservation and transplantation, and clearly demonstrates no tumour seeding in their frozen-thawed and xenografted tissue. This information is vital for doctors to provide patients with meaningful and accurate advice on the possibilities and risks of ovarian tissue reimplantation. STUDY FUNDING/COMPETING INTEREST(S): This study was supported by grants from the Fonds National de la Recherche Scientifique de Belgique-the Excellence of Science (FNRS-EOS), number 30443682 awarded to M.-M.D. and T.Y.T.N., FNRS grant number 5/4/150/5 and FNRS-PDR Convention grant number T.0077.14 awarded to M.-M.D., grant 2018-042 from the Foundation Against Cancer awarded to A.C., and private donations (Ferrero, de Spoelberch). The authors declare no competing financial interests. TRIAL REGISTRATION NUMBER: N/A.


Assuntos
Neoplasias do Sistema Nervoso Central , Preservação da Fertilidade , Animais , Criopreservação , Feminino , Humanos , Camundongos , Ovário , Estudos Prospectivos , Transplante Heterólogo
4.
Mycoses ; 64(2): 174-180, 2021 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-33065769

RESUMO

BACKGROUND: Determining the extent of cryptococcal disease (CD) is key to therapeutic management. Treatment with fluconazole is only recommended for localised pulmonary disease. Induction therapy with amphotericin B (AmB) and flucytosine is recommended for disease at other sites, irrespective of central nervous system (CNS) involvement, but this is not often followed in patients without meningitis. In this study, we compared treatment and mortality between patients with CD of the CNS and other extrapulmonary (OE) sites. METHODS: This is a retrospective, single-centre study of all hospitalised patients with nonpulmonary cryptococcal infection from 2002 to 2015 who underwent lumbar puncture. Demographics, predisposing factors, comorbidities, clinical presentation, laboratory values, antifungal treatment and mortality data were collected to evaluate 90-day mortality and treatment differences between patients with OE and CNS CD. Survival analysis was performed using multivariable Cox regression analysis. RESULTS: Of 193 patients analysed, 143 (74%) had CNS CD and 50 (26%) had OE CD. Ninety-day mortality was 23% and similar between the OE and CNS CD groups (22% vs 23%, p = .9). In the comorbidity-adjusted multivariable Cox regression model, mortality risk was similar in the OE and CNS groups. Fewer patients with OE CD received induction therapy with AmB and flucytosine compared to those with CNS disease (28% vs 71.3%, p < .001). CONCLUSION: Patients with OE CD had similar 90-day mortality compared to those with CNS disease. Despite current guideline recommendations, patients with OE disease were less likely to receive appropriate induction therapy with AmB and flucytosine compared to patients with CNS disease.


Assuntos
Doenças do Sistema Nervoso Central/tratamento farmacológico , Doenças do Sistema Nervoso Central/mortalidade , Criptococose/tratamento farmacológico , Criptococose/mortalidade , Adulto , Idoso , Anfotericina B/uso terapêutico , Antifúngicos/uso terapêutico , Doenças do Sistema Nervoso Central/diagnóstico , Doenças do Sistema Nervoso Central/microbiologia , Criptococose/diagnóstico , Cryptococcus , Quimioterapia Combinada , Feminino , Fluconazol/uso terapêutico , Flucitosina/uso terapêutico , Humanos , Masculino , Meningite Criptocócica/diagnóstico , Meningite Criptocócica/tratamento farmacológico , Meningite Criptocócica/microbiologia , Meningite Criptocócica/mortalidade , Pessoa de Meia-Idade , Missouri/epidemiologia , Resultado do Tratamento
5.
Neurol Sci ; 41(8): 2111-2120, 2020 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-32114667

RESUMO

INTRODUCTION: Gliomatosis cerebri (GC), defined until 2016 as a distinct astrocytic glioma entity, has been removed from the 2016 World Health Organization classification of tumors of the central nervous system. However, its identity is still debated. MATERIALS AND METHODS: We retrospectively present 122 patients, including a subgroup with histology confirmation (n = 75, cohort b). RESULTS: Radiological features showed extension limited to 3 lobes in 31%; bilateral, midline, and basal ganglia and subtentorial involvement in 95%, 52%, 84%, and 60%, respectively; and contrast enhancement in 59.5%. Perioperative mortality occurred in 4%. Histology concluded for grades II, III, and IV, respectively, in 31%, 35%, and 22% (not specified in 12%). Thirty-one percent had isocitrate dehydrogenase (IDH) 1 mutation. Treatments included radiotherapy in 51.2% and chemotherapy in 74.5%. Median overall survival was 17 months. Negative prognostic factors for survival were older age, poorer Karnofsky Performance Scale (KPS), subtentorial, midline and disseminated disease, and lack of chemotherapy, at univariate analysis. At multivariate analysis, KPS ≥ 80, chemotherapy, and subtentorial and disseminated disease remained prognostic (p < 0.0001). For cohort b, same prognostic factors were confirmed, except for midline location, at univariate analysis; at multivariate analysis, only KPS ≥ 80 and chemotherapy remained prognostic (p < 0.0001). CONCLUSION: We described clinical, neuroimaging, management, and histomolecular features of one of the largest GC series. We identified KPS ≥ 80, radiological pattern as subtentorial localization and dissemination, and chemotherapy as prognostic factors, at multivariate analysis. Planning prospective study, associated to focused genetic assays, could help to clarify if GC has specific features that may result in the identification as a separate entity from other gliomas.


Assuntos
Neoplasias Encefálicas , Glioma , Neoplasias Neuroepiteliomatosas , Idoso , Neoplasias Encefálicas/diagnóstico por imagem , Neoplasias Encefálicas/genética , Neoplasias Encefálicas/terapia , Humanos , Neoplasias Neuroepiteliomatosas/diagnóstico por imagem , Neoplasias Neuroepiteliomatosas/genética , Neoplasias Neuroepiteliomatosas/terapia , Prognóstico , Estudos Prospectivos , Estudos Retrospectivos
6.
Br J Haematol ; 185(6): 1136-1141, 2019 06.
Artigo em Inglês | MEDLINE | ID: mdl-30784044

RESUMO

In the modern era, clinicians and pathologists increasingly make challenging diagnoses in patients with suspected lymphoma using minimal amounts of diagnostic material. The increase in utilization of minimally invasive procedures, such as fine needle aspiration or needle core biopsies, lead to challenges in our ability to make accurate histopathological assessments of disease, including the integration of new diagnostic and prognostic testing, with smaller amounts of material. The trend towards minimally invasive diagnostics is also often in conflicting interest with researchers seeking to study tissue specimens to better understand the biology and genetics of these diseases to move the field forward. Thankfully, there are emerging fields which seek to extract large amounts of diagnostic and prognostic data out of material that is circulating in the blood of patients with lymphoma. Here we will review recent exciting data regarding the use of circulating tumour cells, circulating tumour DNA, and the detection and utility of circulating exosomes and how it can assist in diagnosis, prognosis and therapeutic monitoring. These advances hold the promise to enable continued safe patient care while also advancing discovery, translational and clinical research.


Assuntos
Linfoma/diagnóstico , Biomarcadores Tumorais , Ácidos Nucleicos Livres , DNA de Neoplasias , Gerenciamento Clínico , Exossomos , Humanos , Linfoma/etiologia , Linfoma/metabolismo , Neoplasia Residual/diagnóstico , Células Neoplásicas Circulantes/patologia
7.
Mycoses ; 62(8): 651-658, 2019 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-31066092

RESUMO

Invasive aspergillosis (IA) is a serious hazard to haematological and critical care patients. Impactful risk factors for developing IA have been characterised; however, systematic analysis of baseline prognostic factors for treatment course of IA is missing. To understand prognostic variables, we analysed original articles identifying baseline factors that predict treatment outcome in patients with IA. PubMed database was searched for publications since database inception until May 2018. Inclusion criteria were published baseline prognostic factors present at the diagnosis of IA. In total, 58 studies from 267 centres reported 7320 patients with IA and 40 different predictors. Unfavourable predictors in medical history were kidney (7.4%, 10/136) and liver failure (3.7%, 5/136), ICU admission (3.7%, 5/136) and uncontrolled underlying disease (3.7%, 5/136). Regarding state of immunosuppression, negative outcome predictors were prolonged neutropenia (12.5%, 17/136), corticosteroid treatment (8.1%, 11/136) and graft-vs-host disease (3.7%, 5/136). On the pathogen side, relevant predictors were galactomannan positivity (8.1%, 11/136), Aspergillus terreus infection (2.2%, 3/136) and lack of amphotericin B susceptibility (1.5%, 2/136). IA-specific predictors were disseminated disease (5.1%, 7/136) and CNS involvement (2.9%, 4/136). Imaging results associated with negative outcome were multiple consolidations (2.9%, 4/136), bipulmonary lesions (2.2%, 3/136) and pleural effusion (2.2%, 3/136). At diagnosis of IA, most frequently identified predictors of outcome were neutropenia, corticosteroid use, elevated galactomannan, renal failure and disseminated disease. The predictors may be used to identify patients at high risk for treatment failure and to stratify neglected patient groups for clinical trials.


Assuntos
Aspergillus/patogenicidade , Aspergilose Pulmonar Invasiva/diagnóstico , Adulto , Antifúngicos/uso terapêutico , Galactose/análogos & derivados , Doença Enxerto-Hospedeiro/complicações , Humanos , Terapia de Imunossupressão/efeitos adversos , Aspergilose Pulmonar Invasiva/tratamento farmacológico , Mananas/metabolismo , Neutropenia/complicações , Prognóstico , Estudos Retrospectivos , Fatores de Risco , Falha de Tratamento , Resultado do Tratamento
8.
Acta Neurochir (Wien) ; 161(2): 343-349, 2019 02.
Artigo em Inglês | MEDLINE | ID: mdl-30652202

RESUMO

BACKGROUND: Hemangioblastomas (HB) are benign tumors of the central nervous system (CNS) that can appear sporadic or as part of von Hippel-Lindau (VHL) disease. It is often curable with surgical resection, but upon relapse, the disease exhibits a treatment-refractory course. CASE REPORT: A patient treated for sporadic cerebellar HB relapsed 12 years post-surgery. She developed disseminated disease throughout the CNS, including leptomeningeal manifestations. Repeat surgery and craniospinal radiation therapy were unsuccessful. CONCLUSION: This case is in line with previous publications on disseminated non-VHL HB. Available treatment options are inefficient, emphasizing the need for improved understanding of HB biology to identify therapeutic targets.


Assuntos
Neoplasias Cerebelares/cirurgia , Hemangioblastoma/cirurgia , Doença de von Hippel-Lindau/patologia , Adulto , Neoplasias Cerebelares/patologia , Neoplasias Cerebelares/radioterapia , Diagnóstico Diferencial , Feminino , Hemangioblastoma/patologia , Hemangioblastoma/radioterapia , Humanos , Metástase Neoplásica , Doença de von Hippel-Lindau/genética
9.
Artigo em Inglês | MEDLINE | ID: mdl-29378709

RESUMO

Mycobacterium avium subsp. hominissuis mainly causes disseminated infection in immunocompromised hosts, such as individuals with human immunodeficiency virus (HIV) infection, and pulmonary infection in immunocompetent hosts. However, many aspects of the different types of M. avium subsp. hominissuis infection remain unclear. We examined the antibiotic susceptibilities and genotypes of M. avium subsp. hominissuis isolates from different hosts by performing drug susceptibility testing using eight antibiotics (clarithromycin, rifampin, ethambutol, streptomycin, kanamycin, amikacin, ethionamide, and levofloxacin) and variable-number tandem-repeat (VNTR) typing analysis for 46 isolates from the sputa of HIV-negative patients with pulmonary M. avium subsp. hominissuis disease without previous antibiotic treatment and 30 isolates from the blood of HIV-positive patients with disseminated M. avium subsp. hominissuis disease. Interestingly, isolates from pulmonary M. avium subsp. hominissuis disease patients were more resistant to seven of the eight drugs, with the exception being rifampin, than isolates from HIV-positive patients. Moreover, VNTR typing analysis showed that the strains examined in this study were roughly classified into three clusters, and the genetic distance from reference strain 104 for isolates from pulmonary M. avium subsp. hominissuis disease patients was statistically significantly different from that for isolates from HIV-positive patients (P = 0.0018), suggesting that M. avium subsp. hominissuis strains that cause pulmonary and disseminated disease have genetically distinct features. Significant differences in susceptibility to seven of the eight drugs, with the exception being ethambutol, were noted among the three clusters. Collectively, these results suggest that an association between the type of M. avium subsp. hominissuis infection, drug susceptibility, and the VNTR genotype and the properties of M. avium subsp. hominissuis strains associated with the development of pulmonary disease are involved in higher levels of antibiotic resistance.


Assuntos
Antibacterianos/uso terapêutico , Genótipo , Pneumopatias/tratamento farmacológico , Pneumopatias/microbiologia , Mycobacterium avium/efeitos dos fármacos , Mycobacterium avium/genética , Humanos , Testes de Sensibilidade Microbiana , Mycobacterium avium/patogenicidade , Sequências de Repetição em Tandem/genética
10.
Proc Natl Acad Sci U S A ; 112(50): E6937-44, 2015 Dec 15.
Artigo em Inglês | MEDLINE | ID: mdl-26621722

RESUMO

Newborns are significantly more susceptible to severe disease after infection with herpes simplex virus (HSV) compared with adults, with differences in the host response implicated as a major factor. To understand host response differences between these age groups, we investigated the shutoff of protein synthesis by the host and the retargeting of host phosphatase PP1α by the HSV-1 protein γ34.5 for reversal of translational arrest. In a murine newborn model of viral dissemination, infection with the HSV-1 mutant for PP1α binding resulted in complete absence of disease. PP1α-binding mutant HSV-1 replicated in visceral organs early after inoculation, demonstrating that HSV-1 replication requires PP1α-targeting only later in infection. Newborn mice deficient in type I IFN signaling partially rescued the virulence of the PP1α-binding mutant virus, suggesting an IFN-independent role for eIF2α kinases during infection. When we investigated the contribution of PP1α targeting to pathogenesis in the brain, we found that the inability of HSV-1 to bind PP1α increased survival time in both newborn and adult mice. Unlike disseminated disease, type I IFN signaling in the brain was required to attenuate disease following PP1α-mutant virus infection. Furthermore, pharmacologic inhibition of eIF2α dephosphorylation reduced HSV-1 replication in a brain slice culture model of encephalitis. Our findings reveal age-dependent differences in γ34.5 function and tissue-specific reliance on the type I IFN response for protection from HSV disease. These results define an important role for γ34.5 in neonatal infections in contrast to other studies indicating that the autophagy-inhibiting function of γ34.5 is dispensable for pathogenesis in the newborn brain.


Assuntos
Encefalopatias/patologia , Herpes Simples/patologia , Fosfoproteínas Fosfatases/metabolismo , Simplexvirus/fisiologia , Animais , Animais Recém-Nascidos , Fator de Iniciação 2 em Eucariotos/metabolismo , Técnicas In Vitro , Camundongos , Fosforilação , Simplexvirus/patogenicidade , Virulência
11.
Br J Haematol ; 178(2): 231-239, 2017 07.
Artigo em Inglês | MEDLINE | ID: mdl-28419412

RESUMO

Reimplantation of cryopreserved ovarian tissue (OT) can successfully restore ovarian function in young cancer patients after gonadotoxic treatment. However, for patients with leukaemia, there is a risk of malignant cell transmission. Our objective was to evaluate minimal disseminated disease in OT from leukaemia patients and test a follicle isolation technique to obtain disease-free follicle suspensions. Cryopreserved OT from 12 leukaemia patients was thawed and analysed by histology and long-term xenografting in immunosuppressed mice. In 10 patients, follicles were isolated from OT, and polymerase chain reaction (PCR) was performed on tissue, digested ovarian suspensions and isolated follicle suspensions to investigate leukaemic cell presence. Mean patient age was 17·1 years. An average of 3·2 follicles were isolated per mm² of cortex. Xenografting of OT induced leukaemic masses in 2/12 mice. PCR identified leukaemic cell presence in 66% of OT. Malignant cells were also detected in digested ovarian suspensions. However, none of the follicle samples (>2300 follicles tested) showed any malignant cell presence after washing. This study demonstrates that it is possible to recover large numbers of viable follicles from cryopreserved OT of leukaemia patients. All isolated and washed follicle suspensions tested negative for leukaemic cells, giving leukaemia patients genuine hope of fertility restoration.


Assuntos
Criopreservação/métodos , Preservação da Fertilidade/métodos , Leucemia/complicações , Folículo Ovariano/transplante , Adolescente , Adulto , Animais , Biomarcadores Tumorais/metabolismo , Sobrevivência Celular/fisiologia , Criança , Pré-Escolar , Feminino , Humanos , Infertilidade Feminina/prevenção & controle , Leucemia/patologia , Leucemia/terapia , Leucemia Mielogênica Crônica BCR-ABL Positiva/complicações , Leucemia Mielogênica Crônica BCR-ABL Positiva/patologia , Leucemia Mielogênica Crônica BCR-ABL Positiva/terapia , Leucemia Mieloide Aguda/complicações , Leucemia Mieloide Aguda/patologia , Leucemia Mieloide Aguda/terapia , Camundongos , Proteínas de Neoplasias/genética , Transplante de Neoplasias/métodos , Reação em Cadeia da Polimerase/métodos , Leucemia-Linfoma Linfoblástico de Células Precursoras/complicações , Leucemia-Linfoma Linfoblástico de Células Precursoras/patologia , Leucemia-Linfoma Linfoblástico de Células Precursoras/terapia , Fatores de Risco , Translocação Genética , Transplante Heterólogo , Adulto Jovem
12.
Br J Haematol ; 175(3): 467-475, 2016 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-27392319

RESUMO

Burkitt lymphoma (BL) and Diffuse Large B-Cell Lymphoma (DLBCL) account for most cases of non-Hodgkin lymphoma (NHL) in childhood. We report the clinical characteristics, outcome and prognostic factors in children with BL or DLBCL treated according to the Associazione Italiana Ematologia Oncologia Pediatrica (AIEOP) LNH-97 protocol. Patients aged up to 18 years that were newly diagnosed with BL/DLBCL were included in the study. Therapy consisted of pre-phase followed by 2-6 high-dose chemotherapy courses tailored according to lactate dehydrogenase (LDH) value and disease stage. A total of 442 patients (379 BL, 63 DLBCL) were enrolled between 1997 and 2014, of whom 18 failed to achieve remission, 6 experienced treatment-related death, 2 developed second malignancy and 20 relapsed. At a median follow-up time of 5 years, overall survival was 93% (±1%) and event-free survival was 90% (±1%). LDH value above the median value had an independently negative prognostic value (P < 0·0001). However, in the subgroup of 128 patients in which minimal disseminated disease (MDD) was analysed, MDD-positivity became the only unfavourable prognostic factor for progression-free survival. Tailored chemotherapy could be extremely effective with limited toxicity. Identification of MDD as a hallmark of a higher risk of treatment failure may provide a target population for treatment intensification by anti-CD20.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Linfoma de Burkitt/tratamento farmacológico , Linfoma de Burkitt/mortalidade , Linfoma Difuso de Grandes Células B/tratamento farmacológico , Linfoma Difuso de Grandes Células B/mortalidade , Adolescente , Biomarcadores , Linfoma de Burkitt/diagnóstico , Criança , Pré-Escolar , Feminino , Humanos , Lactente , Linfoma Difuso de Grandes Células B/diagnóstico , Masculino , Estadiamento de Neoplasias , Neoplasia Residual/diagnóstico , Prognóstico , Resultado do Tratamento
13.
Hum Reprod ; 31(10): 2292-302, 2016 10.
Artigo em Inglês | MEDLINE | ID: mdl-27591237

RESUMO

STUDY QUESTION: What is the risk of finding malignant cells in cryopreserved ovarian tissue from sarcoma patients? SUMMARY ANSWER: Minimal disseminated disease (MDD) was not detected in frozen-thawed ovarian tissue from 26 patients by any of the sensitive methods applied. WHAT IS KNOWN ALREADY: In case of leukemia, the risk of malignant cell transmission through the graft is well known and widely documented. However, for bone cancer, like Ewing sarcoma or osteosarcoma, only a small number of case reports, have been published. These cancers often affect prepubertal girls, in whom ovarian tissue cryopreservation and transplantation is the only option to preserve fertility. STUDY DESIGN, SIZE, DURATION: The presence of malignant cells in cryopreserved ovarian tissue from patients with bone/soft tissue sarcoma was investigated with disease-specific markers for each patient, using immunohistochemistry (IHC), FISH and real-time quantitative RT-PCR (qPCR), with the original tumor serving as a positive control. PARTICIPANTS/MATERIALS, SETTING, METHODS: Forty-eight sarcoma patients were enrolled in the study, 12 of whom subsequently died. In each case, tissue from the primary tumor was investigated in order to identify markers (immunohistochemical and/or molecular) to analyze the ovarian tissue case by case. Ovarian tissue from osteosarcoma (n = 15), liposarcoma (n = 1) and undifferentiated sarcoma (n = 5) patients could not be evaluated, as no specific markers were detected by FISH or sensitive IHC in any of their primary tumoral tissue. One patient with Li-Fraumeni syndrome was also excluded from the study. IHC analyses were therefore performed on ovarian tissue from 26 patients and qPCR on 19. The primary tumors involved were Ewing sarcoma family of tumors (n = 14), rhabdomyosarcoma (n = 7), synovial sarcoma (n = 2), clear cell sarcoma (n = 2) and a malignant peripheral nerve sheath tumor (n = 1). MAIN RESULTS AND THE ROLE OF CHANCE: MDD was not detected in any of the 26 analyzed samples using sensitive techniques in this largest reported series, even from patients who subsequently died and/or those who presented with metastasis (11/26), hence the most aggressive forms of bone cancer. Indeed, anti-CD99 IHC and PCR performed on patients presenting with Ewing sarcoma family of tumors (n = 14) was negative in all cases. In patients with soft tissue sarcoma (n = 12) primitive tumor markers were detected by IHC and were negative in ovarian tissue. PCR could only be performed in 6/12 of these patients, again proving negative. LIMITATIONS, REASONS FOR CAUTION: Cryopreserved ovarian fragments to be transplanted cannot be tested, so this analysis of malignant cells cannot guarantee that all cryopreserved fragments will not contain any disseminated disease. Moreover, molecular markers are not readily available for all types of tumors. WIDER IMPLICATIONS OF THE FINDINGS: These results are reassuring regarding the risk of malignant cells in the ovary for transplantation, as the study involves a large series including different types of sarcomas. We believe this will help clinicians in their patient counseling for fertility preservation and restoration. STUDY FUNDING/COMPETING INTERESTS: This work was supported by the Fonds National de la Recherche Scientifique de Belgique-FNRS under Grants Nos 7.4578.14 (Télévie to MS) and 5/4/150/5 to MMD. The authors declare no competing financial interests.


Assuntos
Neoplasias Ósseas/patologia , Criopreservação , Preservação da Fertilidade/métodos , Ovário/patologia , Sarcoma/secundário , Adolescente , Adulto , Criança , Feminino , Humanos , Adulto Jovem
14.
Pediatr Blood Cancer ; 62(11): 1906-13, 2015 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-26109265

RESUMO

BACKGROUND: The use of intensive chemotherapy regimens in children with lymphoblastic lymphoma (LBL) has significantly improved outcome, but the salvage rate for these patients is still poor. The aim of this study was to evaluate the prognostic value of minimal disseminated disease (MDD), studied by multiparametric flow cytometry (MFC), in pediatric patients with T- and B-lineage LBL. PROCEDURE: We examined bone marrow (BM) and peripheral blood (PB) samples from a series of 65 children affected by T- (52) and B-lineage (13) LBL using an MFC method; 10 of them were also analyzed for clonality of T-cell receptor gene rearrangements. RESULTS: MDD was detected in 49% (32/65) of BM samples, whereas only 21% (14/65) were positive at standard morphological evaluation. Findings from MFC analyses of paired BM and PB samples were highly concordant. We analyzed the prognostic significance of MDD results detected at diagnosis in morphologically negative patients, as almost all relapsed cases (10/11) did not have any morphological involvement of BM at diagnosis. Using an MDD cut-off level of 3% by FCM (75th percentile), 5-year event-free survival (EFS) was 60% (SE ± 22) for patients with MDD >3% LBL cells versus 83% (SE ± 6) for the remaining patients (P = 0.04). No statistically significant difference in EFS was observed between LBL patients considering all the other clinical characteristics. CONCLUSIONS: Our data demonstrated that MDD studied at diagnosis by MFC could represent a useful prognostic tool in childhood LBL and further application for better stratification is warranted.


Assuntos
Leucemia-Linfoma Linfoblástico de Células Precursoras , Linfócitos B/metabolismo , Linfócitos B/patologia , Células da Medula Óssea/metabolismo , Células da Medula Óssea/patologia , Criança , Pré-Escolar , Intervalo Livre de Doença , Feminino , Rearranjo Gênico do Linfócito T , Humanos , Masculino , Neoplasia Residual , Leucemia-Linfoma Linfoblástico de Células Precursoras/tratamento farmacológico , Leucemia-Linfoma Linfoblástico de Células Precursoras/metabolismo , Leucemia-Linfoma Linfoblástico de Células Precursoras/mortalidade , Leucemia-Linfoma Linfoblástico de Células Precursoras/patologia , Receptores de Antígenos de Linfócitos B/metabolismo , Receptores de Antígenos de Linfócitos T/metabolismo , Taxa de Sobrevida , Linfócitos T/metabolismo , Linfócitos T/patologia
15.
Cancer Res Treat ; 2024 May 28.
Artigo em Inglês | MEDLINE | ID: mdl-38810968

RESUMO

Purpose: The risk stratification of pediatric anaplastic large cell lymphoma (ALCL) has not been standardized. In this study, new risk factors were included to establish a new risk stratification system for ALCL, and its feasibility in clinical practice was explored. Materials and Methods: On the basis of the non-Hodgkin's lymphoma Berlin-Frankfurt-Munster 95 (NHL-BFM-95) protocol, patients with minimal disseminated disease (MDD), high-risk tumor site (multiple bone, skin, liver, and lung involvement), and small cell/lymphohistiocytic (SC/LH) pathological subtype were enrolled in risk stratification. Patients were treated with a modified NHL-BFM-95 protocol combined with an anaplastic lymphoma kinase inhibitor or vinblastine (VBL). Results: A total of 136 patients were enrolled in this study. The median age was 8.8 years. The 3-year event-free survival (EFS) and overall survival of the entire cohort were 77.7% [95% Confidence Interval (CI), 69.0%-83.9%] and 92.3% (95% CI,86.1%-95.8%), respectively. The 3-year EFS rates of low-risk group (R1), intermediate-risk group (R2), and high-risk group (R3) patients were 100%, 89.5% (95% CI, 76.5%-95.5%, and 67.9% (95% CI, 55.4%-77.6%), respectively. The prognosis of patients with MDD (+), stage IV cancer, SC/LH lymphoma, and high-risk sites was poor, and the 3-year EFS rates were 45.3% (95% CI, 68.6%-19.0%), 65.7% (95% CI, 47.6%-78.9%), 55.7% (95% CI, 26.2%-77.5%), and 70.7% (95% CI, 48.6%-84.6%), respectively. At the end of follow-up, one of the 5 patients who received maintenance therapy with VBL relapsed, and seven patients receiving ALK inhibitor maintenance therapy did not experience relapse. Conclusion: This study has confirmed the poor prognostic of MDD (+) ,high risk site and SC/LH ,but patients with SC/LH lymphoma and MDD (+) at diagnosis still need to receive better treatment (ClinicalTrials.gov number, NCT03971305).

16.
Cureus ; 16(1): e52815, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38389588

RESUMO

Primary or secondary non-Hodgkin lymphomas (NHLs) involving the female gynecologic tract are rare. T-cell subtypes are further rare and portend a worse prognosis. We present a case of a 23-year-old female presenting with a cervical mass accompanied by constitutional symptoms and abnormal vaginal bleeding. Immunohistochemistry studies revealed the presence of disseminated T-cell non-Hodgkin lymphoma that was anaplastic lymphoma kinase (ALK)-positive. The patient demonstrated a complete response to systemic chemotherapy initially and again after the relapse of the disease one year after diagnosis. To our knowledge, this is the first case of an ALK-positive T-cell lymphoma with secondary involvement of the uterus and cervix; all previously published cases of this histologic subtype in the gynecologic tract describe primary disease of the vagina. This case emphasizes the importance of immunohistochemistry studies inclusive of T-cell and B-cell markers when evaluating biopsies from cervical tumors to render the appropriate diagnosis and guide systemic therapy.

17.
Cureus ; 15(2): e35417, 2023 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-36987462

RESUMO

Histoplasmosis is a rare fungal infection caused by the dimorphic species Histoplasma (H.) capsulatum, found in the Midwest and Central United States. Infection with H. capsulatum is observed in other regions beyond the Ohio and Mississippi River valley, including Mexico and Central and South America. There have been increasing reports of the disease occurring in Latin America in immunocompromised patients with human immunodeficiency virus (HIV). This case report details clinical findings of disseminated histoplasmosis in an immunocompromised patient, newly diagnosed with acquired immunodeficiency syndrome (AIDS) and initially presenting with sepsis of unclear source. The focus of this case report is the significance of detailed history-taking guiding for an appropriate investigation and recognition of the infectious source and giving insight into the management of disseminated histoplasmosis in the outpatient and inpatient settings.

18.
Cureus ; 15(7): e41493, 2023 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-37551207

RESUMO

Histoplasmosis is a mycosis caused by Histoplasma capsulatum, a dimorphic fungus endemic to areas with nitrogen-rich soil, like the one contaminated with bird and bat excrement. Patients with a deficient immune response are especially at risk for developing invasive infections, such as disseminated histoplasmosis, and secondary immunodeficiency can be a consequence of malnutrition. This case report presents a 15-month-old male infant with malnutrition who presented with signs and symptoms of disseminated histoplasmosis, including fever, malaise, weight loss, cough, and diarrhea. The infant came from a geographic area where histoplasmosis is endemic, and he was a member of a cultural group with a higher prevalence of histoplasmosis than the general population. On physical examination, hepatosplenomegaly, lymphadenopathy, and lung crackles were found, which are common in most patients with histoplasmosis. The keystone of diagnosis of H. capsulatum infection is antigen detection, but the criterion standard is isolation of the organism from body specimens through laboratory culture. Histological diagnosis is especially useful for rapid diagnosis. Treatment of disseminated histoplasmosis in the pediatric population consists of deoxycholate amphotericin B for four to six weeks followed by itraconazole to complete a total of three months of treatment. Despite the involvement of multiple organ systems, the patient recovered satisfactorily after the completion of amphotericin B treatment for one month and the resolution of his malnourishment.

19.
Cureus ; 15(5): e39372, 2023 May.
Artigo em Inglês | MEDLINE | ID: mdl-37362519

RESUMO

Our case report confirms adrenal insufficiency following three weeks of monkeypox infection in an immunocompetent patient. As there is no specific treatment for monkeypox, steroid replacement therapy remains the cornerstone of managing adrenal insufficiency. By highlighting the importance of early identification and tracing in our case report, we contribute to the growing body of knowledge on monkeypox and emphasize the importance of identifying adrenal insufficiency and other complications like meningoencephalitis, prompting a significant early intervention that can help manage these complications effectively, potentially improving patient outcomes. In addition, understanding disease progression by tracing monkeypox cases provides valuable information on the disease's natural history, including the timeline and sequence of symptoms, associated complications, and outcomes, to avoid any small chance related to our lack of validated knowledge or incorrect assessment of the disease or the associated complications between an exposure and an effect in the target organs.

20.
Asian J Neurosurg ; 17(4): 631-634, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36570766

RESUMO

Calvarium and skull base can be affected by a variety of benign, tumor-like, and malignant processes. Skull metastases (SMs) may be located in any layer of the skull and may be incidental or present with neurological symptoms during the diagnostic workup. In the present study, we discuss the occurrence of SMs from various index malignancies and their myriad clinical presentation. This data-based study includes patients of bone metastases between June 2018 and July 2020. Patients with skull bone metastases were recognized, and location of primary site, their clinical presentation, and management strategy were noted. Ten patients with skull bone metastases were identified during this period. Four patients had skull base location with clinical manifestation as syndromes. Six patients had primary from breast cancer, three from Ewing's sarcoma, and one from lung cancer. Management varied according to the primary site and symptoms of each patient. SM, though not rare, is often diagnosed incidentally but presents diagnostic and management challenges in the patient with cancer.

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