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1.
Int J Surg Pathol ; : 10668969231188419, 2023 Jul 17.
Artigo em Inglês | MEDLINE | ID: mdl-37461272

RESUMO

Background. Fibro-adipose vascular anomaly (FAVA) is a rare benign mesenchymal lesion. Characterized primarily by intramuscular vascular malformation with secondary overgrowth of other mesenchymal elements, particularly fibro-adipose tissue, the condition is sometimes complicated by nonspecific clinical and imaging features, causing diagnostic dilemma. Herein, we attempted to outline and correlate the clinical characteristics, imaging findings, and histopathological features of this unusual entity. Method. The study design was retrospective in nature. Computerized database of our institute was searched for tumors, and archived slides were reviewed. Pertinent clinical data including imaging findings and treatment details were also recovered for correlation. Result. Among total of 24 patients identified, mean age was approximately 16 years, with the presence of nearly equal gender distribution. Pain along with swelling was most common symptoms with the presence of movement limitation, in few. Most lesions were long-standing and anatomically confined to lower limb with no side predilection. Using imaging, the majority of the lesions were identified as vascular anomaly or venous malformation, with FAVA being a differential diagnosis in few lesions. However, in a couple of patients, likelihood of mesenchymal tumors was also suggested, radiologically. On histology, the lesions showed the presence of clustered back to back, abnormal thin-walled, variably dilated, blood-filled sac-like vessels amid skeletal muscle bundles, along with extensive fibro-adipose tissue and variably atrophic skeletal muscle bundles, at the periphery, diagnostic of FAVA. Conclusion. Owing to the presence of overlapping clinical and imaging features, FAVA is often misdiagnosed, causing dilemma in clinical management. Clinical, radiological, and histopathological correlation is thereby warranted for clinching the correct diagnosis.

2.
Sci Rep ; 13(1): 3739, 2023 03 06.
Artigo em Inglês | MEDLINE | ID: mdl-36879122

RESUMO

Small cell lung carcinomas (SCLC) are aggressive tumors with high propensity to metastasize. Recent NCCN guidelines have incorporated immunotherapy in extensive stage SCLC. Limited benefit in few patients compounded by side effects of unwonted immune-checkpoint-inhibitor (ICPI) usage necessitates identification of potential biomarkers predicting response to ICPIs. Attempting this, we analysed expression of various immunoregulatory molecules in tissue biopsies and paired blood samples of SCLC patients. In 40 cases, immunohistochemistry for expression of immune inhibitory receptors CTLA-4, PD-L1 and IDO1 was performed. Matched blood samples were quantified for IFN-γ, IL-2, TNF-α and sCTLA-4 levels using immunoassay and additionally for IDO1 activity (Kynurenine/Tryptophan ratio) using LC-MS. Immunopositivity for PD-L1, IDO1 and CTLA-4 was identified in 9.3%, 6.2% and 71.8% cases, respectively. Concentration of serum IFN-γ (p-value < 0.001), TNF-α (p-value = 0.025) and s-CTLA4 (p-value = 0.08) were higher in SCLC patients while IL-2 was lower (p-value = 0.003) as compared to healthy controls. IDO1 activity was significantly elevated in SCLC cohort (p-value = 0.007). We proffer that SCLC patients show immune suppressive milieu in their peripheral circulation. Analysis of CTLA4 immunohistochemical expression along with s-CTLA4 levels appears prospective as biomarkers for predicting responsiveness to ICPIs. Additionally, evaluation of IDO1 appears cogent both as prognostic marker and potential therapeutic target as well.


Assuntos
Neoplasias Pulmonares , Carcinoma de Pequenas Células do Pulmão , Humanos , Antígeno CTLA-4 , Antígeno B7-H1 , Interleucina-2 , Estudos Prospectivos , Fator de Necrose Tumoral alfa , Biópsia
3.
Indian J Pathol Microbiol ; 66(1): 24-30, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36656206

RESUMO

Background: IgA anti-tissue transglutaminase-2 antibody (anti-TG2Ab) deposits in intestinal and extraintestinal organs have been used to link the respective pathological changes in these organs with celiac disease (CeD). Aims: To know if parts of intestine other than the duodenum, such as esophagus, stomach, and colon, have any pathology related to potential CeD or have mucosal IgA anti-TG2 Ab deposits. Settings and Design: A prospective case-control study conducted from April 2018 to December 2019. Materials and Methods: Nine patients with potential CeD and 27 age- and gender-matched patients with irritable bowel syndrome were recruited as cases and controls, respectively. Mucosal biopsies were collected from esophagus, stomach, duodenum, and rectosigmoid regions, histological changes were evaluated, and IgA anti-TG2 Ab deposits were analyzed in these regions by two-color immunohistochemical staining. Statistics: Data were analyzed using statistical software Stata 14.0. Results: No distinct difference in mucosal lymphocytosis were identified between biopsies of patients with potential CeD and controls at the following sites: esophagus (11.1% vs 0%, P = 0.079), stomach (14.3% vs 7.7%, P = 0.590), and rectum (20% vs 0%, P = 0.067). Co-localized IgA anti-TG2Ab deposits were observed more in potential CeD than in controls at esophagus 22.2% (2/9) vs 0%, P = 0.012; stomach 66.7% (6/9) vs 11.5% (3/26), P < 0.001; and duodenum 66.7% (6/9) vs 0%, P < 0.001 but not at rectum 0% (0/4) vs 0% (0/25). Conclusion: Although histological changes are not distinct, a subset of subjects with potential CeD has pan-intestinal involvement other than in the duodenum.


Assuntos
Doença Celíaca , Humanos , Estudos de Casos e Controles , Transglutaminases , Mucosa Intestinal/patologia , Intestino Delgado/patologia , Biópsia , Imunoglobulina A , Autoanticorpos
4.
Saudi J Gastroenterol ; 29(1): 59-65, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36348611

RESUMO

Background: The causal association between IgA nephropathy (IgAN) and celiac disease (CeD) is based on their clinical coexistence. In this prospective study, we screened patients with IgAN for CeD and explored the utility of analysis of IgA anti-TG2 antibody deposits, for establishing a causal association. Methods: Biopsy-proven patients of IgAN were screened for serum IgA anti-tissue transglutaminase antibody (IgA anti-tTG Ab) titer and thereafter were invited to undergo endoscopic duodenal biopsy. Corresponding duodenal and kidney biopsies were subjected to IgA anti-TG2 antibody colocalization study using dual-color immunohistochemistry and immunofluorescence techniques. Additionally, kidney biopsies from 105 patients with IgAN who did not give consent for serology analysis, 30 non-IgA nephropathies, and 10 normal controls were also included. Dual-color-stained slides were interpreted based on stain distribution and intensity scores, and Pearson's index >0.3-1 on confocal imaging was considered significant. Results: Of a cohort of 151 patients with IgAN, 32 consented to undergo sero-screening and 5 of them had high serum anti-tTG Ab titer. Two out of the latter consented to endoscopic duodenal biopsies, in whom modified Marsh grade 3b changes were identified. Strong IgA anti-TG2 antibody deposits were noted in the kidney and duodenal biopsies of these patients. One patient out of non-consenting 105 patients with IgAN and 3 out of 30 patients with other non-IgA nephropathies also showed IgA anti-TG2 deposits. None of the healthy kidney tissues showed IgA anti-TG2 Ab deposits. Conclusions: Co-localized IgA anti-TG2 deposits in the kidney biopsies in patients with IgAN help to establish a pathogenic link with CeD. A small proportion of patients with IgAN have associated CeD.


Assuntos
Doença Celíaca , Glomerulonefrite por IGA , Humanos , Doença Celíaca/complicações , Glomerulonefrite por IGA/complicações , Imunoglobulina A , Transglutaminases , Proteína 2 Glutamina gama-Glutamiltransferase , Estudos Prospectivos , Autoanticorpos/metabolismo , Proteínas de Ligação ao GTP , Biópsia
5.
Indian J Otolaryngol Head Neck Surg ; 74(Suppl 2): 1797-1799, 2022 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-36452597

RESUMO

The pleomorphic adenoma arising in the parotid gland is a benign neoplasm that is aptly named because of its histomorphological diversity. The stromal component can contain chondromyxoid material, amyloid, and elastic fibers, along with a few rare reports of crystalline structures present in this tumor. Especially, the crystalline components are rarely encountered or appreciated in routine pathology reporting. Here, we report a case of pleomorphic adenoma of the parotid gland, in which tyrosine-rich crystalloids were identified in abundance and were confirmed with special stains and electron microscopy. Though their exact source is not yet known, crystallization of the stromal or myoepithelial cell secretion has been hypothesized. This comprehensive report is to make the histopathologists aware of this rare morphological observation in pleomorphic adenomas so that more cases are identified and followed-up to reveal the impact of their presence in a subset of pleomorphic adenomas.

6.
Chest ; 162(4): e183-e190, 2022 10.
Artigo em Inglês | MEDLINE | ID: mdl-36210112

RESUMO

CASE PRESENTATION: A 50-year-old woman who was a nonsmoker presented to the out-patient-department with history of dry cough and breathlessness on exertion for the past 4 months along with onset of dull aching chest pain for the last 2 weeks. Her breathlessness had gradually deteriorated to the point that she experienced dyspnea even on walking a few steps on level ground. Loss of appetite and significant weight loss during the same period also formed part of her clinical semiology. There was no history of fever, night sweats, orthopnea, paroxysmal nocturnal dyspnea, hemoptysis, dysphagia, hoarseness of voice, edema, headache, visual disturbance, weakness of any extremity, or drooping of eyelids. Her medical history revealed that she had undergone hysterectomy 8 years earlier for removal of a probable uterine mass, for which no documentation was available.


Assuntos
Tosse , Dispneia , Dor no Peito , Tosse/diagnóstico , Tosse/etiologia , Diagnóstico Diferencial , Dispneia/diagnóstico , Dispneia/etiologia , Feminino , Hemoptise , Rouquidão , Humanos , Pessoa de Meia-Idade
7.
Indian J Pathol Microbiol ; 65(3): 705-708, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35900509

RESUMO

Anaplastic large cell lymphoma (ALCL) is a subcategory of the mature T-cell neoplasm characterized by sheets of cluster of differentiation (CD)30-positive pleomorphic large cells mostly present as lymphadenopathy. Here, we describe a case of Small cell variant ALCL with leukemic presentation without lymphadenopathy. A 68-year-old male presented with fatigue and weakness; examination revealed a total leukocyte count of 295,000/uL. The peripheral smear showed cells having cerebriform nuclei comprising 90% of the leukocytes. The flow cytometry showed that the cells were immunopositive for CD3 (weak), CD4, CD7, and negative for the rest of the markers. The cell blocks from the peripheral blood showed cells with immunopositivity for CD30, anaplastic lymphoma kinase (ALK), and Epithelial membrane antigen (EMA). A diagnosis of the small cell variant of ALK-positive ALCL was made. Due to the presence of atypical pleomorphic cells without lymphadenopathy, the case has a diagnostic dilemma with differential diagnosis of Sezary syndrome, T-cell prolymphocytic leukemia, and adult T-cell leukemia/lymphoma. Karyotyping and additional immunohistochemistry help for the confirmation of the diagnosis.


Assuntos
Leucemia , Linfadenopatia , Linfoma Anaplásico de Células Grandes , Adulto , Idoso , Humanos , Antígeno Ki-1/metabolismo , Linfoma Anaplásico de Células Grandes/diagnóstico , Linfoma Anaplásico de Células Grandes/patologia , Masculino , Receptores Proteína Tirosina Quinases
8.
Artigo em Inglês | MEDLINE | ID: mdl-35193331

RESUMO

Cushing's syndrome is a rare disease in the paediatric age group. Adrenocortical carcinomas (ACC) constitute the most common cause of Cushing's syndrome between 1 and 5 years of age. Often, adrenocortical carcinomas co-secrete other hormones such as androgens (testosterone), deoxy-corticosterone (DOCA), or 17-hydroxy-progesterone [17(OH)P] in addition to cortisol. This may manifest with symptoms and signs of precocious puberty along with Cushing's syndrome. It is rare for a benign adrenocortical adenoma to co-secrete androgens and other hormones in addition to cortisol. Differentiation between adenoma and carcinoma is difficult in all aspects: clinical, radiological, and histopathological. Here, we describe the case of a 2.5-year-old male child who presented with Cushing's syndrome and virilization. Although we suspected ACC clinically, the radiological and histopathological findings were suggestive of benign adrenocortical adenoma. Our case represents the diagnostic challenge that exists in paediatric adrenocortical tumours.


Assuntos
Adenoma , Neoplasias do Córtex Suprarrenal , Adenoma Adrenocortical , Síndrome de Cushing , Puberdade Precoce , Adenoma/diagnóstico , Adenoma/diagnóstico por imagem , Neoplasias do Córtex Suprarrenal/diagnóstico , Neoplasias do Córtex Suprarrenal/diagnóstico por imagem , Adenoma Adrenocortical/diagnóstico , Adenoma Adrenocortical/diagnóstico por imagem , Criança , Pré-Escolar , Síndrome de Cushing/diagnóstico , Síndrome de Cushing/etiologia , Humanos , Masculino , Puberdade Precoce/diagnóstico , Puberdade Precoce/etiologia
10.
Dig Dis Sci ; 67(8): 3649-3661, 2022 08.
Artigo em Inglês | MEDLINE | ID: mdl-34499270

RESUMO

BACKGROUND: While celiac disease (CeD) is considered to affect primarily the small intestine, pathological changes in other parts of the gastrointestinal tract (GIT) are also known to occur. IgA anti-tissue transglutaminase-2 antibody (anti-TG2 Ab) deposits at the site of involvement is one of the methods to establish CeD-related tissue pathology. AIMS: To explore the utility of IgA anti-TG2 Ab deposits in pan-gastrointestinal mucosal biopsies as evidence of CeD-related pathologies. METHODS: Forty-two treatment-naive patients with CeD and 45 patients with irritable bowel syndrome were included as cases and controls, respectively. Mucosal biopsies were collected from the esophagus, stomach, duodenum, and rectosigmoid regions at baseline from cases and controls, and additionally after 6-months of gluten-free diet in cases. All biopsies were evaluated for histological changes and subjected to dual-color immunohistochemical staining for identifying IgA anti-TG2 Ab deposits. RESULTS: Significantly higher number of patients with CeD had lymphocytic esophagitis (9.7% vs. 0%, P = 0.05), lymphocytic gastritis (35% vs. 8.8%, P < 0.01) and lymphocytic colitis (17.4% vs. 0%, P < 0.05) than that in controls. IgA anti-TG2 Ab deposits were observed in significantly more numbers in esophagus (30.9% vs. 6%, P < 0.001), stomach (62.2% vs. 9.3%, P < 0.01), duodenum (88.5% vs. 0%, P < 0.001) and rectum (17.4% vs. 0%, P < 0.05) than that in controls. There was a decline, but not statistically significant, in severity of lymphocytosis and intensity of IgA anti-TG2 Ab deposits in follow-up biopsies. CONCLUSION: Significantly higher number of patients with CeD had evidence of lymphocytic infiltration and IgA anti-TG2 deposits along GIT suggesting that CeD affects other parts of GIT.


Assuntos
Doença Celíaca , Transglutaminases , Autoanticorpos , Estudos de Casos e Controles , Proteínas de Ligação ao GTP , Humanos , Imunoglobulina A , Mucosa Intestinal/metabolismo
11.
World Neurosurg ; 159: e62-e69, 2022 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-34871801

RESUMO

BACKGROUND: Subependymal giant cell astrocytoma (SEGA) is a World Health Organization grade 1 neoplasm, which, due to its dubious morphologic features, may be misdiagnosed as a high-grade tumor at times. This tumor shows binary immunoexpression including both glial and neural markers, leading to a state of diagnostic quandary. Recent evidences have surmised the diagnostic utility of thyroid transcription factor 1 (TTF-1), spurring us to study the practicality of this marker in distinguishing SEGAs from its mimics. METHODS: In this study, TTF-1 immunohistochemistry using clone 8G7G3/1 (1:50) was performed in 38 cases of SEGA, 30 cases of central neurocytoma, 10 cases each of intraventricular glioblastoma and ependymoma, and 5 cases of cortical tubers. Additionally, serine/threonine-protein kinase B-Raf (BRAFV600E) mutation, a common genetic alteration in pediatric low-grade-glial tumors with neuronal-differentiation, was analyzed using Ventana immunohistochemistry platform. RESULTS: TTF-1 immunopositivity was seen in all 38 cases (100%) of SEGAs, with 20 cases (52.6%) showing diffuse (>50% of tumor area) expression while focal (<50%) immunopositivity was seen in 18 cases (47.3%). None of the cases demonstrated serine/threonine-protein kinase B-Raf immunolabeling. Barring 2 cases of neurocytoma (6.6%), all other cases including ependymoma, glioblastoma, and cortical tubers were immunonegative for TTF-1. CONCLUSIONS: The congruous finding of TTF-1 expression in SEGA and cells of the developing neuroepithelium in the medial ganglionic eminence hint toward a primogenitor cell with neoplastic potential in the presence of impelling factors.


Assuntos
Astrocitoma , Neoplasias Encefálicas , Ependimoma , Glioblastoma , Neurocitoma , Fator Nuclear 1 de Tireoide , Esclerose Tuberosa , Astrocitoma/patologia , Neoplasias Encefálicas/genética , Criança , Ependimoma/diagnóstico , Humanos , Imuno-Histoquímica , Proteínas Proto-Oncogênicas c-akt , Serina , Treonina
12.
J Clin Pathol ; 74(12): 766-773, 2021 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-33789921

RESUMO

AIMS: Despite clinical evidence of liver involvement in patients with coeliac disease (CeD), there is a lack of a method to prove this association. METHODS: Of 146 treatment-naive patients with CeD, 26 had liver dysfunction. Liver biopsies and corresponding small intestinal biopsies were obtained from these 26 patients. Multicolour immunohistochemical and immunofluorescence confocal microscopic studies were performed on paraffin-embedded tissue to detect the IgA/anti-TG2 deposits. Follow-up liver biopsies were taken after a gluten-free diet. RESULTS: Twenty-six out of the 146 patients (17.8%) with suspected coeliac-associated liver disease on histological examination revealed irregular sinusoidal dilatation in 15 (57.6%), steatohepatitis in 4 (15.3%), non-specific chronic hepatitis in 3 (11.5%), autoimmune hepatitis in 2 (7.6%) biopsies, including cirrhosis in one of them, irregular perisinusoidal fibrosis and changes of non-cirrhotic portal fibrosis in one biopsy each (3.8%). IgA/anti-tTG deposits were observed in 22 (84.6%) liver biopsies by dual immunohistochemistry technique, and in 24 (92.3%) by confocal immunofluorescence technique and in all corresponding duodenal biopsies (100%). Overall, IgA/anti-tTG deposits showed 100% sensitivity, 77% specificity and 85% positive predictive value for establishing an association of extraintestinal pathology and CeD using archived tissues. Follow-up liver biopsies could be obtained in five patients; four of them showed not only resolution of the histological lesions but disappearance of IgA/anti-tTG co-localisation. CONCLUSIONS: Data of the present study adds to the body of evidence that liver lesions in patients with CeD are disease related and may have been caused by a similar pathogenic mechanism that causes intestinal changes.


Assuntos
Autoanticorpos/análise , Doença Celíaca/imunologia , Proteínas de Ligação ao GTP/imunologia , Imuno-Histoquímica , Mucosa Intestinal/imunologia , Intestino Delgado/imunologia , Fígado/imunologia , Transglutaminases/imunologia , Adolescente , Adulto , Biópsia , Estudos de Casos e Controles , Doença Celíaca/diagnóstico , Doença Celíaca/dietoterapia , Dieta Livre de Glúten , Feminino , Imunofluorescência , Humanos , Mucosa Intestinal/patologia , Intestino Delgado/patologia , Fígado/patologia , Masculino , Microscopia Confocal , Valor Preditivo dos Testes , Proteína 2 Glutamina gama-Glutamiltransferase , Fatores de Tempo , Resultado do Tratamento , Adulto Jovem
13.
Head Neck Pathol ; 15(4): 1303-1307, 2021 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-33398684

RESUMO

Alveolar soft part sarcoma (ASPS) is infrequent in children. While head and neck locations, including the orbit and tongue, are described, only six cases of sinonasal ASPS are reported in the literature. We report two cases of pediatric oro-maxillofacial ASPS. The first case presented as a sinonasal mass in a 13-year-old girl, while the second was a tongue lesion in a 4-year-old female. Histologic examination, TFE3 immunopositivity, and ultrastructural findings of rhomboid crystalline inclusions helped confirm the diagnosis. The diagnosis of ASPS is challenging in children and in uncommon sites like the head and neck. Patients should be routinely followed up for detection of residual or recurrent disease, particularly in cases with positive resection margins.


Assuntos
Neoplasias de Cabeça e Pescoço/diagnóstico , Sarcoma Alveolar de Partes Moles/diagnóstico , Neoplasias da Língua/diagnóstico , Adolescente , Biomarcadores Tumorais/análise , Pré-Escolar , Terapia Combinada , Diagnóstico Diferencial , Feminino , Neoplasias de Cabeça e Pescoço/patologia , Neoplasias de Cabeça e Pescoço/terapia , Humanos , Sarcoma Alveolar de Partes Moles/patologia , Sarcoma Alveolar de Partes Moles/terapia , Neoplasias da Língua/patologia , Neoplasias da Língua/terapia
14.
Cancer Cytopathol ; 129(1): 53-61, 2021 01.
Artigo em Inglês | MEDLINE | ID: mdl-32877005

RESUMO

BACKGROUND: NUT carcinoma (NC) is an aggressive neoplasm that often presents with alarge tumor burden and metastases; cytology is frequently one of the primary diagnostic modalities. Primary pulmonary NCs are very rare and cytology descriptions are limited. The current study was performed to analyze the cytomorphological features of primary pulmonary NCs in different cytology samples and preparations. METHODS: A total of 15 cytology specimens from 10 patients with primary pulmonary NCs diagnosed primarily on histology were retrieved and reviewed. RESULTS: Fifteen cytology samples, including aspirates from primary (5 samples) and metastatic (5 samples) sites, sputum (1 sample), and effusions (4 samples), that were prepared as direct smears, centrifuged smears, and cell blocks were reviewed. Aspirate smears from all cases were cellular and demonstrated fragments and cohesive clusters of primitive tumor cells with scant cytoplasm, ovoid nuclei with coarse granular chromatin, and consistently conspicuous single nucleoli in a frequently neutrophil-rich necrotic background with dispersed bare tumor nuclei. In fluid cytology, tight, 3-dimensional tumor clusters and singly lying tumor cells were observed. Squamous differentiation in the form of sheets and singly lying polygonal tumor cells with abundant dense cytoplasm was noted focally in rare cases. The diagnoses during original sign-outs were poorly differentiated carcinoma, poorly differentiated squamous cell carcinoma, and malignant small round cell tumor. NUT-1 (NUT family member 1 protein) immunocytochemistry performed on cell blocks demonstrated characteristic speckled nuclear staining in tumor cells. CONCLUSIONS: Pulmonary NC presents as a poorly differentiated carcinoma with focal to absent squamous differentiation on cytology. Cellular fragments of primitive tumor cells with conspicuous nucleoli should raise suspicion of NUT carcinoma and prompt ancillary testing.


Assuntos
Técnicas Citológicas/métodos , Neoplasias Pulmonares/patologia , Adolescente , Adulto , Idoso , Biópsia , Proteínas de Ciclo Celular/genética , Diagnóstico Diferencial , Feminino , Humanos , Neoplasias Pulmonares/diagnóstico , Neoplasias Pulmonares/genética , Masculino , Pessoa de Meia-Idade , Proteínas de Neoplasias/genética , Proteínas Nucleares/genética , Estudos Retrospectivos , Escarro , Fatores de Transcrição/genética , Adulto Jovem
15.
Ann Otol Rhinol Laryngol ; 130(3): 298-303, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-32680429

RESUMO

OBJECTIVE: Anastomosing hemangioma (AH) is a novel tumor of vascular origin. Though well-documented in the kidney and retroperitoneum, only a single case has been documented in the head and neck, and AH in larynx has not been described. METHODS: A 37-year-old male presented with difficulty in breathing, and hoarseness. Imaging revealed a lesion involving left paraglottic and cricothyroid spaces with destruction of cricoid cartilage, suggestive of a malignant cartilageneous neoplasm. Multiple biopsies were non-diagnostic. RESULTS: Intraoperative frozen section during transcervical resection showed a vascular tumor devoid of nuclear atypia. Histopathological examination revealed a vasoformative tumor comprised of anastomosing capillary-sized vessels lined by flat and hobnail endothelial cells, consistent with AH. The patient was disease-free at 12 months. CONCLUSION: AH are rare neoplasms that may mimic a malignancy on imaging, especially in sites where they have not been documented. Due to their vascular nature, biopsies are often non-diagnostic, making preoperative diagnosis difficult. Frozen section may assist in decision-making on the extent of resection required.


Assuntos
Hemangioma/patologia , Neoplasias Laríngeas/patologia , Adulto , Obstrução das Vias Respiratórias/etiologia , Biópsia por Agulha Fina , Cartilagem Cricoide/cirurgia , Secções Congeladas , Hemangioma/complicações , Hemangioma/diagnóstico por imagem , Hemangioma/cirurgia , Rouquidão/etiologia , Humanos , Neoplasias Laríngeas/complicações , Neoplasias Laríngeas/diagnóstico por imagem , Neoplasias Laríngeas/cirurgia , Laringoscopia , Imageamento por Ressonância Magnética , Masculino
16.
Acta Cytol ; 65(1): 67-74, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-32854100

RESUMO

INTRODUCTION: Inactivating mutations of the SMARCA4 (SWI/SNF-related, matrix-associated, actin-dependent regulator of chromatin, subfamily A, member 4) gene and/or loss of the BRG1 (brahma-related gene 1) protein defines SMARCA4-deficient thoracic sarcoma (SMARCA4-dTS), an aggressive neoplasm with a usually fatal outcome. Similar SMARCA4 mutations/BRG1 loss is also seen in a subset of non-small cell lung carcinomas (NSCLCs; SMARCA4-dNSCLCs) that lack alterations in currently targetable oncogenic drivers, that is, EGFR, ALK, and ROS1. There is limited knowledge on the cytomorphological features of these SMARCA4-deficient thoracic neoplasms. METHODS: We retrospectively analysed the cytology of 2 cases each of SMARCA4-dNSCLC and SMARCA4-dTS to understand their cytomorphological overlap, if any, and identify features that would prompt testing for BRG1 loss. RESULTS: All 4 patients were males presenting with advanced disease, with a mean age of 41.5 years (SMARCA4-dTS) and 58.5 years (SMARCA4-dNSCLC) at presentation. The cytology of the 2 SMARCA4-dTSs was strikingly similar, showing predominantly singly dispersed rhabdoid phenotype tumour cells with perinuclear cytoplasmic condensations in an inflammatory or necrotic background. The cytology raised suspicion for a wide range of differentials, including melanoma, high-grade lymphoma, germ cell tumour, undifferentiated carcinoma, and undifferentiated sarcoma. SMARCA4-dNSCLCs, on the other hand, were recognizable as poorly differentiated (adeno)carcinomas and were easily distinguished from SMARCA4-dTSs, with both cases showing cohesive clusters of frequently large tumour cells with abundant pale cytoplasm. CONCLUSION: A diagnosis of SMARCA4-dTS is possible on cytology with appropriate ancillary testing and a high index of suspicion. The cytology of SMARCA4-dNSCLCs does not overlap with SMARCA4-dTS; rather, it resembles that of any poorly differentiated (adeno)carcinoma in the limited numbers analysed in this study.


Assuntos
Carcinoma Pulmonar de Células não Pequenas/genética , Carcinoma Pulmonar de Células não Pequenas/patologia , DNA Helicases/genética , Neoplasias Pulmonares/genética , Neoplasias Pulmonares/patologia , Proteínas Nucleares/genética , Neoplasias Torácicas/genética , Neoplasias Torácicas/patologia , Fatores de Transcrição/genética , Adulto , Biomarcadores Tumorais , Carcinoma/genética , Carcinoma/patologia , Citodiagnóstico/métodos , Humanos , Masculino , Pessoa de Meia-Idade , Mutação/genética , Estudos Retrospectivos , Tumor Rabdoide/genética , Tumor Rabdoide/patologia , Sarcoma/genética , Sarcoma/patologia , Neoplasias de Tecidos Moles/genética , Neoplasias de Tecidos Moles/patologia
17.
World Neurosurg ; 143: 209-213, 2020 11.
Artigo em Inglês | MEDLINE | ID: mdl-32730969

RESUMO

BACKGROUND: Granular cell astrocytoma (GCA) is an aggressive variant of astrocytoma characterized by predominantly round-to-polygonal cells with abundant eosinophilic granular cytoplasm. This tumor usually lack the morphological signatures of conventional astrocytoma and are devoid of typical features which define a malignant neoplasm, leading to potential misdiagnosis. CASE DESCRIPTION: We report GCA in a 50-year-old man presenting with severe headache along with vertiginous sensation and sensory seizures of left upper limb for past two months. Imaging showed multiple intra-axial, hyperintense space-occupying lesions in bilateral anterior temporal lobe, left parietal lobe, left thalamus and cerebellum, raising possibility of lymphoma/metastases. Histopathologic examination revealed sheets of large polygonal cells with distinct cellular outline, ample amount of eosinophilic PAS-positive granular cytoplasm, eccentrically placed irregular, round-to-ovoid nuclei with occasional prominent nucleoli. On immunohistochemistry, tumor cells were diffusely immunopositive for Olig2, S100, EMA, lysozyme and CD68, and they were immunonegative for GFAP, LCA, pan-CK, TTF-1, TFE-3, PAX-8, SOX10, MAP2, MBP, NF, H3K27M, H3K27me3, p53, IDH1 (R132H), CD1a, langerin and BRAFV600E. Numerous scattered macrophages were highlighted by CD163. MIB 1-labelling-index was approximately 5%-6%. Overall features were congruous with final diagnosis of GCA. CONCLUSIONS: GCAs behave in a belligerent manner irrespective of their morphologic grade as they are seen to exhibit genetic alterations similar to glioblastoma. Thereby, they warrant early diagnosis for conducive patient management.


Assuntos
Adenocarcinoma/diagnóstico , Astrocitoma/diagnóstico , Neoplasias Encefálicas/diagnóstico , Tumor de Células Granulares/diagnóstico , Adenocarcinoma/diagnóstico por imagem , Adenocarcinoma/patologia , Astrocitoma/diagnóstico por imagem , Astrocitoma/patologia , Biópsia , Encéfalo/diagnóstico por imagem , Encéfalo/patologia , Neoplasias Encefálicas/diagnóstico por imagem , Neoplasias Encefálicas/patologia , Tumor de Células Granulares/diagnóstico por imagem , Tumor de Células Granulares/patologia , Humanos , Imuno-Histoquímica , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade
18.
Med Mycol Case Rep ; 28: 55-59, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32477856

RESUMO

Mucormycosis isolated to the mandible is a rare presentation occurring generally after dental procedures. The case we report presented with discharging sinuses over facial region with radiological appearance of isolated osteomyelitis of the mandible. The patient used to apply an addictive dental powder over his teeth leading to caries. Following this, he pulled out all his teeth, which probably led to his condition. Invasive sampling revealed mucormycosis. An extensive search for an underlying immunodeficiency revealed that the patient had chronic granulomatous disease (CGD). Despite a prolonged course of L-Amphotericin B, the patient continued to have intermittent pus discharge and surgical debridement and curettage was eventually required. The patient had a chronic course with minimal soft tissue involvement which initially did not raise the suspicion of mucormycosis. The main learning point is that an unusual invasive fungal infection in an otherwise healthy host can be the first symptom of an underlying primary immunodeficiency, like CGD. Invasive fungal infections in patients with CGD often have an indolent course.

19.
Ann Pediatr Cardiol ; 10(2): 218-219, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28566837

RESUMO

Rhabdomyoma is a well characterised entity in a neonate. Herein, we report a massive biventricular rhabdomyoma in a neonate presenting with cyanosis and congestive heart failure which was confirmed on autopsy. The report is for documentation of an unusually large tumour.

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