RESUMO
The drivers of immune evasion are not entirely clear, limiting the success of cancer immunotherapies. Here we applied single-cell spatial and perturbational transcriptomics to delineate immune evasion in high-grade serous tubo-ovarian cancer. To this end, we first mapped the spatial organization of high-grade serous tubo-ovarian cancer by profiling more than 2.5 million cells in situ in 130 tumors from 94 patients. This revealed a malignant cell state that reflects tumor genetics and is predictive of T cell and natural killer cell infiltration levels and response to immune checkpoint blockade. We then performed Perturb-seq screens and identified genetic perturbations-including knockout of PTPN1 and ACTR8-that trigger this malignant cell state. Finally, we show that these perturbations, as well as a PTPN1/PTPN2 inhibitor, sensitize ovarian cancer cells to T cell and natural killer cell cytotoxicity, as predicted. This study thus identifies ways to study and target immune evasion by linking genetic variation, cell-state regulators and spatial biology.
Assuntos
Neoplasias Ovarianas , Evasão Tumoral , Feminino , Humanos , Neoplasias Ovarianas/imunologia , Neoplasias Ovarianas/genética , Células Matadoras Naturais/imunologia , Análise de Célula Única , Linhagem Celular Tumoral , Linfócitos T/imunologia , Regulação Neoplásica da Expressão Gênica , Microambiente Tumoral/imunologia , Evasão da Resposta Imune , Linfócitos do Interstício Tumoral/imunologia , Linfócitos do Interstício Tumoral/metabolismoRESUMO
As a critical tumor suppressor, PTEN has gained much attention in cancer research. Emerging evidence suggests an association between PTEN status and clinical outcome in certain tumors, and may be predictive of response to several therapies. However, the significance of PTEN deficiency in tubo-ovarian high-grade serous carcinomas (HGSCs) is still poorly understood. We evaluated PTEN expression in HGSCs and determined its clinical relevance. A cohort of 76 HGSC specimens was profiled using tissue microarray. Immunohistochemistry (IHC) of PTEN, ER, PR, AR, CD8, FOXP3, and PD-L1 was performed. Targeted gene panel testing by massively parallel sequencing was performed in 51 cases. PTEN deficiency (complete or subclonal loss) detected by IHC was identified in 13 of the 62 HGSCs (21%) and was significantly correlated with reduced expression of ER and worse first progression-free survival (P < .05) but not with PD-L1 expression, the density of intratumoral T lymphocytes, or overall survival. In our cohort, tumor progression within 1 year of PARP inhibitor therapy was found more frequently in PTEN-deficient cases than in PTEN-intact cases (100% vs 52%). Molecular profiling showed that intragenic mutation or deletion was not the predominant mechanism for PTEN inactivation in HGSCs. In addition, CCNE1 amplification was found to be mutually exclusive with PTEN deficiency at both protein and DNA levels. An analysis of the genomic data from 1702 HGSC samples deposited with The Cancer Genome Atlas database obtained from cBioPortal confirmed the low rate of detection of PTEN gene alterations and the mutually exclusive nature of PTEN loss and CCNE1 amplification in HGSCs. These findings indicate that PTEN deficiency defines a distinct clinically significant subgroup of HGSCs with a tendency for ER negativity, wild-type CCNE1 status, inferior clinical outcomes, and potential drug resistance. These tumors may benefit from PI3K pathway inhibitors in combination with other ovarian cancer regimens, which deserves further investigation.
Assuntos
Carcinoma , Cistadenocarcinoma Seroso , Neoplasias Ovarianas , Feminino , Humanos , Intervalo Livre de Progressão , Antígeno B7-H1/genética , Fosfatidilinositol 3-Quinases , Neoplasias Ovarianas/genética , Neoplasias Ovarianas/patologia , Cistadenocarcinoma Seroso/patologia , Proteínas Oncogênicas/genética , Ciclina E/genética , PTEN Fosfo-Hidrolase/genéticaRESUMO
Uveal melanoma (UM) is the most common primary intraocular tumor in adults, and despite excellent local control, more than 50% of patients develop and die from metastatic disease. Loss of BAP1 nuclear staining, a surrogate marker of BAP1 mutation, and preferentially expressed antigen in melanoma (PRAME) messenger RNA overexpression, as assessed using qPCR, have previously been shown to correlate with increased metastasis rate in UM. In this study, we demonstrated that UM could be successfully risk-stratified using a combination of BAP1 and PRAME immunohistochemical (IHC) stains. We retrospectively reviewed 318 UM cases with sufficient tissue and performed BAP1 and PRAME IHC to stratify them as BAP1+/PRAME- (group 1, n = 135), BAP1+/PRAME+ (group 2, n = 43), BAP1-/PRAME- (group 3, n = 94), and BAP1-/PRAME+ (group 4, n = 46). Increasing the study risk group on the basis of loss of BAP1 expression and positive PRAME staining was associated with a higher rate of metastasis and disease-specific death and lower metastasis-free survival (MFS) and disease-specific survival (DSS). Among tumors with loss of BAP1 staining, PRAME positivity was associated with shorter MFS (P = .018) and showed a trend toward shorter DSS (P = .061). Among tumors with retained BAP1 staining, PRAME positivity was associated with shorter MFS and DSS (P = .001 and P = .021, respectively). In summary, a combination of BAP1 and PRAME IHC can be used for risk stratification of UMs.
Assuntos
Melanoma , Neoplasias Uveais , Adulto , Humanos , Prognóstico , Imuno-Histoquímica , Estudos Retrospectivos , Proteínas Supressoras de Tumor/genética , Melanoma/patologia , Neoplasias Uveais/metabolismo , Ubiquitina Tiolesterase/genética , Antígenos de NeoplasiasRESUMO
DICER1 syndrome is a tumor predisposition syndrome in which patients are at an increased risk of developing a wide variety of benign and malignant neoplasms with a hallmark constellation of pediatric pleuropulmonary blastoma, cystic nephroma, and thyroid lesions. DICER1 encodes an RNA endoribonuclease that is crucial to the processing of microRNA and may play a role in the maturation of Müllerian tissue. Within the gynecologic tract, germline mutations in DICER1 are associated with an array of rare tumors, including Sertoli-Leydig cell tumor, embryonal rhabdomyosarcoma of the cervix, gynandroblastoma, and juvenile granulosa cell tumor, which typically present in childhood, adolescence, or early adulthood. In addition, somatic DICER1 mutations have been described in rare gynecologic tumors such as adenosarcoma, Sertoli cell tumor, ovarian fibrosarcoma, cervical primitive neuroectodermal tumor, carcinosarcoma, and germ cell tumors. In light of the significant association with multiple neoplasms, genetic counseling should be considered for patients who present with a personal or family history of these rare DICER1-associated gynecologic tumors. This review highlights the most current understanding of DICER1 genetic alterations and describes the clinical, histopathologic, and immunohistochemical features and differential diagnoses for gynecologic tumors associated with DICER1 mutation.
Assuntos
RNA Helicases DEAD-box/genética , Neoplasias dos Genitais Femininos/genética , Ribonuclease III/genética , Adolescente , Adulto , Diagnóstico Diferencial , Feminino , Fibrossarcoma/genética , Neoplasias dos Genitais Femininos/patologia , Genitália Feminina/patologia , Mutação em Linhagem Germinativa , Humanos , Mutação , Neoplasias Ovarianas/diagnóstico , Neoplasias Ovarianas/genética , Neoplasias Ovarianas/patologiaRESUMO
AIM: We simulated the budget impact of biosimilar erythropoiesis-stimulating agent (ESA) in EU G5 countries. MATERIALS & METHODS: Three models were built to estimate the number of patients who could be provided with antineoplastic therapy with rituximab, bevacizumab or trastuzumab from cost savings of biosimilar erythropoietin use in a hypothetical panel of 100,000 patients. The associated number of patients needed to convert to biosimilar ESA to provide such treatments was also calculated. RESULTS: Under fixed dosing, the savings from 100% conversion were 110,592,159, translating into an additional 9770 rituximab, 3912 bevacizumab, or 3713 trastuzumab treatments. Under weight-based dosing, the savings from 100% conversion were 146,170,333, corresponding to an additional 12,913 rituximab, 5171 bevacizumab or 4908 trastuzumab treatments. The number of patients needed to convert ranged from four to 51. CONCLUSION: Using biosimilar ESA for supportive cancer care yields significant savings and increases accessibility to primary antineoplastic therapy in a budget neutral way.
Assuntos
Anemia/tratamento farmacológico , Antineoplásicos/efeitos adversos , Eritropoetina/uso terapêutico , Hematínicos/uso terapêutico , Neoplasias/tratamento farmacológico , Anemia/induzido quimicamente , Anemia/economia , Anticorpos Monoclonais Humanizados/economia , Anticorpos Monoclonais Humanizados/uso terapêutico , Anticorpos Monoclonais Murinos/economia , Anticorpos Monoclonais Murinos/uso terapêutico , Antineoplásicos/economia , Antineoplásicos/uso terapêutico , Bevacizumab , Medicamentos Biossimilares/uso terapêutico , Custos de Medicamentos , Epoetina alfa , Eritropoetina/economia , União Europeia , Hematínicos/economia , Humanos , Modelos Econômicos , Neoplasias/economia , Proteínas Recombinantes/economia , Proteínas Recombinantes/uso terapêutico , Rituximab , TrastuzumabRESUMO
Identification of ultramutated/ POLE -mutated endometrial carcinomas ( POLEM ECs) has important implications given its association with better prognosis. However, POLE mutation testing is not widely available. Our objective was to evaluate POLEM ECs versus POLE wild-type ( POLEWT ) ECs, within a cohort of consultation cases with features suggestive of an ultramutated phenotype. Consultation cases of EC that had undergone POLE hotspot mutation testing over a 3.5-year period were included. Tumor morphology and immunohistochemistry were reviewed for both groups. Chi-square test and t test were used for statistical analysis. Of 25 consultation cases, 12 harbored a POLE mutation (48%) and 13 were wild-type (52%). Patients with POLEM ECs were younger (59 vs. 71.3 y; P =0.01). Ambiguous histomorphology (5/12 vs. 1/13; P =0.04) and the presence of more than rare bizarre nuclei (8/12 vs. 2/12; P =0.01) differed significantly between POLEM and POLEWT ECs, respectively. In the POLEM group, one case (1/12) demonstrated PMS2 loss, and one (1/12) showed subclonal MLH1/PMS2 loss. Among POLEWT ECs, 3/13 (23%) showed MLH1/PMS2 loss. p53 was subclonally overexpressed in 4/10 POLEM and 1/13 POLEWT cases ( P =0.06). Mutant p53 patterns were seen in 1/10 POLEM versus 6/13 of POLEWT ECs, respectively ( P =0.06). Within our cohort, the specificity of ambiguous histomorphology, bizarre nuclei, subclonal biomarker expression, and marked tumor-infiltrating lymphocytes for POLEM EC was 83%, 80%, 80%, and 71%, respectively. Where universal POLE testing is not available, these data suggest that morphologic screening (particularly ambiguous histomorphology and the presence of more than rare bizarre nuclei) can be useful for selective enrichment of ECs for POLE testing.
Assuntos
Carcinoma Endometrioide , Neoplasias do Endométrio , Feminino , Humanos , Carcinoma Endometrioide/patologia , Proteína Supressora de Tumor p53/genética , Endonuclease PMS2 de Reparo de Erro de Pareamento/genética , Neoplasias do Endométrio/patologia , Prognóstico , Mutação , Proteínas de Ligação a Poli-ADP-Ribose/genéticaRESUMO
To evaluate the feasibility of implementing a pulse oximetry screening protocol at a city of mild elevation with a specific focus on the false-positive screening rate. Pulse oximetry screening was performed according to the proposed guidelines endorsed by the American Academy of Pediatrics at a center in Tucson, AZ, at an elevation of 2,643 ft (806 m). During a 10-month period in 2012, 1069 full-term asymptomatic newborns were screened ≥ 24 h after birth. The mean preductal oxygen saturation was 98.5 ± 1.3 % (range 92-100 %), and the mean postductal oxygen saturation was 98.6 ± 1.3 % (range 94-100 %). Of 1,069 patients screened, 7 were excluded secondary to protocol violations, and 1 screened positive. An echocardiogram was performed on the newborn with the positive screen, and it was normal with the exception of right-to-left shunting across a patent foramen ovale. The false-positive rate was 1/1,062 or 0.094 %. The pulse oximetry screening guidelines recommended by the American Academy of Pediatrics are feasible at an elevation of 2,643 ft (806 m) with a low false-positive rate. Adjustments to the protocol are not required for centers at elevations ≤ 2,643 ft. Future studies at greater elevations are warranted.
Assuntos
Altitude , Estado Terminal , Cardiopatias Congênitas/diagnóstico , Triagem Neonatal/métodos , Oximetria/métodos , Reações Falso-Positivas , Estudos de Viabilidade , Feminino , Idade Gestacional , Cardiopatias Congênitas/metabolismo , Humanos , Recém-Nascido , Masculino , Reprodutibilidade dos TestesRESUMO
BACKGROUND: Human papillomavirus-related oropharyngeal squamous cell carcinoma (HPV-OPSCC) presents frequently as metastasis in a neck lymph node that may be cystic or necrotic. Fine-needle aspiration (FNA) biopsies are often first-line diagnostic procedures. p16 immunohistochemistry (IHC) is a surrogate marker for high-risk HPV (hrHPV) infection but can be challenging to interpret. This study evaluated the use of hrHPV in situ hybridization (ISH) in cytology cell blocks of cystic neck lesions. METHODS: Twenty-four FNA cases with cell blocks and surgical correlates were evaluated. p16 IHC and hrHPV ISH were assessed on cell blocks (C-p16 and C-hrHPV ISH), and hrHPV ISH on surgical samples (S-hrHPV ISH). All results were classified as negative, positive, or equivocal. RESULTS: Two cases were excluded because of insufficient tissue on recut. On the basis of C-hrHPV ISH cases, 12 were positive, 5 were negative, and 5 were equivocal. All 12 positive C-hrHPV ISH cases had concordant S-hrHPV ISH with no false positives. Of the 5 negative C-hrHPV ISH cases, 4 had concordant S-hrHPV ISH, and 1 had a discordant S-hrHPV ISH. Of the 5 equivocal C-hrHPV ISH cases, S-hrHPV ISH were both positive and negative. Fourteen cases were equivocal by C-p16; 9 cases were reliably classified by C-hrHPV ISH (5 positive, 4 negative; 64%). CONCLUSIONS: C-hrHPV ISH can be reliably used, especially when positive. A negative or equivocal interpretation of C-hrHPV ISH may warrant repeat testing. Compared to C-p16, C-hrHPV ISH is more frequently diagnostic and could be helpful for HPV-OSCC diagnosis and management.
Assuntos
Alphapapillomavirus , Carcinoma de Células Escamosas , Neoplasias de Cabeça e Pescoço , Infecções por Papillomavirus , Biomarcadores Tumorais , Carcinoma de Células Escamosas/patologia , Inibidor p16 de Quinase Dependente de Ciclina , DNA Viral , Neoplasias de Cabeça e Pescoço/diagnóstico , Humanos , Hibridização In Situ , Papillomaviridae/genética , Infecções por Papillomavirus/complicações , Infecções por Papillomavirus/diagnóstico , Infecções por Papillomavirus/patologiaRESUMO
BACKGROUND: Small round cell tumors (SRCTs) are a broad category of diverse malignant tumors composed of monotonous undifferentiated cells. Involvement of serous fluids by SRCT is rare; however, the identification of exfoliated malignant cells is a crucial component of management and has significant implications for treatment and prognosis. The most common effusion tumors with SRCT morphology include Ewing sarcoma, synovial sarcoma, rhabdomyosarcoma (RMS), small-cell neuroendocrine carcinoma (SCNC), and desmoplastic SRCT, and the cytomorphologic distinction between these tumors is challenging. The purpose of this article is to describe the morphologic features of the most common SRCT in fluids and propose helpful ancillary testing. SUMMARY: Effusion SRCTs display similar primitive and undifferentiated morphologic features although each has subtle variations. Ewing sarcoma is a mesenchymal neoplasm and harbors characteristic translocations t(11;22) (EWSR1-FLI1) or t(21;22) (EWSR1-ERG). In fluids, Ewing sarcoma shows poorly differentiated cells of variable size with round to oval nuclei, prominent nucleoli, and scant cytoplasm. In contrast, synovial sarcoma typically involves extremities and expresses a fusion transcript in t(X;18) (SS18-SSX). This soft tissue neoplasm demonstrates uniform cells with irregular nuclear contours, characteristic nuclear folding, and scant cytoplasm. RMS is a neoplasm arising from skeletal muscle, and the alveolar subtype demonstrates a translocation in t(2;13) (PAX3-FOXO1). The malignant cells show a spectrum of small round cells and pleomorphic large cells with rhabdoid morphology. RMS cells characteristically express myogenin and MyoD1, markers of skeletal muscle differentiation. Although SCNC is not a classic SRCT, the morphology is similar. SCNC demonstrates tight clusters of malignant cells with nuclear molding and salt-and-pepper chromatin. This tumor classically has neuroendocrine differentiation and is positive for synaptophysin and chromogranin on immunohistochemistry. And last, desmoplastic SRCT typically presents as an intra-abdominal mass in young men and characteristically harbors the translocation t(11;22) (p13;q12) (EWSR1-WT1). Cytomorphologically, the tumor shows small monomorphic cells occasionally arranged as rosette-like structures. KEY MESSAGE: The diagnosis of SRCT can be made in effusion samples and is best achieved with a combination of morphologic features, clinical history, and ancillary testing.
Assuntos
Carcinoma de Células Pequenas , Sarcoma de Ewing , Sarcoma , Neoplasias de Tecidos Moles , Biomarcadores Tumorais/genética , Carcinoma de Células Pequenas/diagnóstico , Diagnóstico Diferencial , Humanos , Imuno-Histoquímica , Masculino , Sarcoma de Ewing/diagnóstico , Sarcoma de Ewing/genética , Sarcoma de Ewing/patologia , Translocação GenéticaRESUMO
Background: The first 90 days after dialysis initiation are associated with high morbidity and mortality in end-stage kidney disease (ESKD) patients. A machine learning-based tool for predicting mortality could inform patient-clinician shared decision making on whether to initiate dialysis or pursue medical management. We used the eXtreme Gradient Boosting (XGBoost) algorithm to predict mortality in the first 90 days after dialysis initiation in a nationally representative population from the United States Renal Data System. Methods: A cohort of adults initiating dialysis between 2008-2017 were studied for outcome of death within 90 days of dialysis initiation. The study dataset included 188 candidate predictors prognostic of early mortality that were known on or before the first day of dialysis and was partitioned into training (70%) and testing (30%) subsets. XGBoost modeling used a complete-case set and a dataset obtained from multiple imputation. Model performance was evaluated by c-statistics overall and stratified by subgroups of age, sex, race, and dialysis modality. Results: The analysis included 1,150,195 patients with ESKD, of whom 86,083 (8%) died in the first 90 days after dialysis initiation. The XGBoost models discriminated mortality risk in the nonimputed (c=0.826, 95% CI, 0.823 to 0.828) and imputed (c=0.827, 95% CI, 0.823 to 0.827) models and performed well across nearly every subgroup (race, age, sex, and dialysis modality) evaluated (c>0.75). Across predicted risk thresholds of 10%-50%, higher risk thresholds showed declining sensitivity (0.69-0.04) with improving specificity (0.79-0.99); similarly, positive likelihood ratio was highest at the 40% threshold, whereas the negative likelihood ratio was lowest at the 10% threshold. After calibration using isotonic regression, the model accurately estimated the probability of mortality across all ranges of predicted risk. Conclusions: The XGBoost-based model developed in this study discriminated risk of early mortality after dialysis initiation with excellent calibration and performed well across key subgroups.
Assuntos
Falência Renal Crônica , Aprendizado de Máquina , Modelos Estatísticos , Diálise Renal , Adulto , Estudos de Coortes , Feminino , Humanos , Falência Renal Crônica/etnologia , Falência Renal Crônica/mortalidade , Falência Renal Crônica/terapia , Masculino , Diálise Renal/métodos , Diálise Renal/estatística & dados numéricos , Reprodutibilidade dos Testes , Medição de Risco , Fatores de Tempo , Resultado do Tratamento , Estados Unidos/epidemiologiaRESUMO
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which causes coronavirus disease-19 (COVID-19), has emerged as the cause of a global pandemic. We used RNA sequencing to analyze 286 nasopharyngeal (NP) swab and 53 whole-blood (WB) samples from 333 patients with COVID-19 and controls. Overall, a muted immune response was observed in COVID-19 relative to other infections (influenza, other seasonal coronaviruses, and bacterial sepsis), with paradoxical down-regulation of several key differentially expressed genes. Hospitalized patients and outpatients exhibited up-regulation of interferon-associated pathways, although heightened and more robust inflammatory responses were observed in hospitalized patients with more clinically severe illness. Two-layer machine learning-based host classifiers consisting of complete (>1000 genes), medium (<100), and small (<20) gene biomarker panels identified COVID-19 disease with 85.1-86.5% accuracy when benchmarked using an independent test set. SARS-CoV-2 infection has a distinct biosignature that differs between NP swabs and WB and can be leveraged for COVID-19 diagnosis.
Assuntos
COVID-19/diagnóstico , Nasofaringe/virologia , RNA Viral/metabolismo , SARS-CoV-2/genética , Área Sob a Curva , COVID-19/metabolismo , COVID-19/patologia , COVID-19/virologia , Biblioteca Gênica , Humanos , Aprendizado de Máquina , RNA Viral/sangue , Curva ROC , Reação em Cadeia da Polimerase Via Transcriptase Reversa , SARS-CoV-2/isolamento & purificação , Sensibilidade e Especificidade , TranscriptomaRESUMO
BACKGROUND: Uveal melanoma is highly aggressive, and overall prognosis depends on mutation status. Fine-needle aspiration biopsies (FNABs) play an important role in obtaining fresh tissue for cytologic diagnosis and molecular studies. It has been suggested that, although FNAB usually provides high diagnostic accuracy, there may be limited cellularity, which may compromise diagnostic potential for molecular studies. FNABs of uveal melanocytic lesions were evaluated to assess sample adequacy for both cytologic evaluation and next-generation sequencing (NGS). METHODS: The authors retrospectively evaluated 36 cases of melanocytic uveal lesions from 2015 to 2018. Samples were obtained by ophthalmologist-performed FNAB and aliquoted for cytology and NGS. Various combinations of direct smears, liquid-based cytology slides, cell blocks, and immunohistochemical stains for melanocytic markers were performed. All samples were tested for molecular alterations using hybrid-capture-based NGS. RESULTS: There was sufficient material for cytologic diagnosis in 33 of 36 cases (92%), for NGS testing in 30 of 36 cases (83%), and for both cytologic diagnosis and NGS testing in 28 of 36 cases (78%). Of 7 cases that were cytologically categorized as indeterminate or diagnosed as "atypical" or "nondiagnostic," NGS testing was sufficient and diagnostic for melanoma in 5 cases. Of the cases diagnosed as melanoma on pathology, 20 cases (87%) had concordant NGS testing results, 2 lacked molecular alterations, and 1 was insufficient for testing. CONCLUSIONS: FNA sampling of melanocytic uveal lesions is adequate for both cytologic diagnosis and NGS testing. In a subset of cases in which pathologic findings were indeterminate, NGS testing results were clarifying for diagnosis. In addition, specific molecular alterations identified can aid in evaluating prognosis and guide further management.
Assuntos
Biomarcadores Tumorais/genética , Citodiagnóstico/métodos , Sequenciamento de Nucleotídeos em Larga Escala/métodos , Melanoma/diagnóstico , Mutação , Neoplasias Uveais/diagnóstico , Adulto , Idoso , Idoso de 80 Anos ou mais , Biópsia por Agulha Fina , Feminino , Seguimentos , Humanos , Masculino , Melanoma/genética , Pessoa de Meia-Idade , Prognóstico , Estudos Retrospectivos , Neoplasias Uveais/genéticaRESUMO
Diagnosis of first-trimester partial mole is challenging as the key morphologic features may not be well-developed and may overlap with those of a nonmolar gestation harboring a cytogenetic disorder or degenerative changes. Genotype testing has emerged as the reference tool to distinguish partial mole (diandric triploid genotype) from its nonmolar mimics. However, observer variation in defining the minimum threshold of how much morphologic alteration is required to trigger genotype testing may result in a subset of partial moles that go undetected. We hypothesized that the results of fetal aneuploidy testing performed for prenatal screening or evaluation of miscarriage may assist with triggering molecular testing in the evaluation of products of conception, specifically if fetal triploidy is detected. Gestations with fetal triploidy are either a partial mole (diandric triploidy) or are nonmolar (digynic triploidy). The aims of this study were to define the prevalence of partial mole in 20 products of conception specimens with known fetal triploidy by performing genotype testing and then to determine how well established morphologic criteria for partial mole correlate with the genotype results in this setting. Genotype testing demonstrated that 65% (13/20) were a partial mole and the remainder were nonmolar digynic triploid gestations. Most partial moles were under 9 weeks gestational age and, as expected, lacked classic well-developed morphologic features. Nearly a third (4/13) of the partial moles were originally interpreted as normal or nonmolar gestations with minimal abnormalities that did not merit molecular testing to exclude a partial mole. Even with the retrospective systematic morphologic review, only 23% (3/13) exhibited the combination of chorionic villous enlargement of ≥2.5 mm and cisterns, which has been previously established as the morphologic criteria with the highest predictive value for a molecularly defined partial mole. The other 77% exhibited focal, limited, variable degrees and extent of villous morphologic alterations. We conclude that, given the high prevalence of partial mole among products of conception with known fetal triploidy and the low prevalence of diagnostic morphologic findings in such specimens, reflex genotype testing should be performed in all such cases, regardless of whether or not the morphologic features are suspicious for a partial mole. This reflex testing strategy mitigates against the subjectivity of determining whether subtle villous abnormalities are significant enough to merit pursuing genotype testing. The success of this strategy depends on the clinician documenting the fetal triploidy result at the time of submitting the products of conception specimen and therefore clinician education is needed. Finally, it remains to be determined whether the risk for postmolar gestational trophoblastic disease is the same in diandric triploid gestations that exhibit classic morphologic features as in those that exhibit minimal or negligible villous morphologic abnormalities.
Assuntos
Mola Hidatiforme/diagnóstico , Mola Hidatiforme/genética , Triploidia , Neoplasias Uterinas/diagnóstico , Neoplasias Uterinas/genética , Vilosidades Coriônicas/patologia , Feminino , Testes Genéticos/métodos , Genótipo , Humanos , Mola Hidatiforme/epidemiologia , Gravidez , Prevalência , Estudos Retrospectivos , Neoplasias Uterinas/epidemiologiaRESUMO
Given the limited availability of serological testing to date, the seroprevalence of SARS-CoV-2-specific antibodies in different populations has remained unclear. Here, we report very low SARS-CoV-2 seroprevalence in two San Francisco Bay Area populations. Seroreactivity was 0.26% in 387 hospitalized patients admitted for non-respiratory indications and 0.1% in 1,000 blood donors in early April 2020. We additionally describe the longitudinal dynamics of immunoglobulin-G (IgG), immunoglobulin-M (IgM), and in vitro neutralizing antibody titers in COVID-19 patients. The median time to seroconversion ranged from 10.3-11.0 days for these 3 assays. Neutralizing antibodies rose in tandem with immunoglobulin titers following symptom onset, and positive percent agreement between detection of IgG and neutralizing titers was >93%. These findings emphasize the importance of using highly accurate tests for surveillance studies in low-prevalence populations, and provide evidence that seroreactivity using SARS-CoV-2 anti-nucleocapsid protein IgG and anti-spike IgM assays are generally predictive of in vitro neutralizing capacity.
Assuntos
Anticorpos Neutralizantes/sangue , Betacoronavirus/imunologia , Infecções por Coronavirus/epidemiologia , Pneumonia Viral/epidemiologia , Anticorpos Antivirais/imunologia , COVID-19 , Teste para COVID-19 , Técnicas de Laboratório Clínico , Infecções por Coronavirus/sangue , Infecções por Coronavirus/diagnóstico , Infecções por Coronavirus/imunologia , Humanos , Imunoglobulina G/imunologia , Imunoglobulina M/imunologia , Pandemias , Pneumonia Viral/sangue , Pneumonia Viral/imunologia , SARS-CoV-2 , São Francisco/epidemiologia , Sensibilidade e Especificidade , Estudos Soroepidemiológicos , Testes Sorológicos/métodosRESUMO
We report very low SARS-CoV-2 seroprevalence in two San Francisco Bay Area populations. Seropositivity was 0.26% in 387 hospitalized patients admitted for non-respiratory indications and 0.1% in 1,000 blood donors. We additionally describe the longitudinal dynamics of immunoglobulin-G, immunoglobulin-M, and in vitro neutralizing antibody titers in COVID-19 patients. Neutralizing antibodies rise in tandem with immunoglobulin levels following symptom onset, exhibiting median time to seroconversion within one day of each other, and there is >93% positive percent agreement between detection of immunoglobulin-G and neutralizing titers.
RESUMO
A low-grade sinonasal sarcoma with neural and myogenic features has recently been defined and characterized. We present a case of this morphologic entity and discuss the differential diagnostic considerations, immunophenotypic character, electron microscopy (EM) findings and positron emission tomography (PET) appearance. We propose an alternative hypothesis of its origin on the basis of immunophenotypic and EM features. A 59-year-old Caucasian male was found to have a mass filling the right ethmoid sinus. On PET, the lesion had a maximum standardized uptake value of 2.9, which is of borderline intensity for sarcoma. Pathologic examination showed morphologic features similar to those reported for low-grade sinonasal sarcoma with neural and myogenic features. The tumor was positive for S100, ß-catenin, caldesmon, and vimentin and negative for smooth muscle actin, muscle-specific actin, desmin, myogenin, and pankeratin. Positivity for ß-catenin raises the alternative possibility of fibroblastic differentiation instead of the proposed myogenic differentiation. EM findings were also consistent with fibroblastic cells.
Assuntos
Neoplasias dos Seios Paranasais/diagnóstico , Neoplasias dos Seios Paranasais/cirurgia , Diagnóstico Diferencial , Humanos , Imunofenotipagem , Imageamento por Ressonância Magnética , Masculino , Microscopia Eletrônica , Pessoa de Meia-Idade , Neoplasias dos Seios Paranasais/patologia , Tomografia por Emissão de Pósitrons , Tomografia Computadorizada por Raios XRESUMO
Coccidioides species (Coccidioides immitis and Coccidioides posadasii) are dimorphic fungi endemic to the Southwestern United States. Initial infection ranges from asymptomatic to mild upper respiratory tract symptoms and may disseminate to other organs including the genitourinary tract. Genitourinary complaints may be the initial presenting signs and symptoms among a minority of patients. We report a case of genitourinary coccidioidomycosis and discussion of genitourinary disease with coccidioidomycosis.