Search results for "Desmoplastic small-round-cell tumor"

showing 4 items of 4 documents

Annulate Lamellae in a Desmoplastic Small Round Cell Tumor

2016

0301 basic medicineAdultPathologymedicine.medical_specialtyOncogene ProteinsDesmoplastic small-round-cell tumorAnnulate lamellaOncogene Proteins FusionBiologyDesmoplastic Small Round Cell TumorPathology and Forensic Medicine03 medical and health sciences0302 clinical medicineNeoplasm RecurrenceMicroscopy Electron TransmissionmedicineBiomarkers TumorHumansRetroperitoneal NeoplasmsReverse Transcriptase Polymerase Chain Reactionmedicine.diseaseImmunohistochemistryRetroperitoneal Neoplasm030104 developmental biology030220 oncology & carcinogenesisImmunohistochemistrySurgeryFemaleAnatomyNeoplasm Recurrence Local
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Defining Ewing and Ewing-like small round cell tumors (SRCT): The need for molecular techniques in their categorization and differential diagnosis. A…

2016

Abstract Background Differentiation of Ewing sarcoma family of tumors (ESFT) and Ewing-like tumors remains problematic. Certain ESFT with morphological and immunohistochemical (IHC) profiles lack the EWSR1-ETS transcript. To improve diagnostic accuracy we investigated the presence of several specific transcripts in 200 small round cell tumors (SRCT) displaying ESFT morphology and immunophenotype in which EWSR1 FISH analysis was non-informative or negative. Design 200 tumors (formalin-fixed, paraffin-embedded) were analyzed by RT-PCR. All tumors were tested for EWSR1-ETS , EWSR1 / WT1 , PAX3 / 7-FOX01 or SYT / SSX transcripts, and the negative tumors were subsequently analyzed for CIC / DUX4…

0301 basic medicinePathologymedicine.medical_specialtyOncogene Proteins FusionDesmoplastic small-round-cell tumorCD99Sarcoma EwingBiologyTranslocation GeneticPathology and Forensic MedicineDiagnosis DifferentialFusion gene03 medical and health sciences0302 clinical medicineImmunophenotypingBiomarkers TumormedicineHumansPathology MolecularIn Situ Hybridization FluorescenceRNA-Binding ProteinsGeneral Medicinemedicine.diseaseSynovial sarcoma030104 developmental biology030220 oncology & carcinogenesisSarcoma Small CellImmunohistochemistryCalmodulin-Binding ProteinsSarcomaRNA-Binding Protein EWSDifferential diagnosisAnnals of Diagnostic Pathology
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Review with novel markers facilitates precise categorization of 41 cases of diagnostically challenging, “undifferentiated small round cell tumors”. A…

2017

Abstract Background Despite extensive immunohistochemical (IHC) and molecular studies combined with morphologic findings, a group of round/ovoid cell tumors histologically similar to Ewing sarcomas (ES) but lacking EWSR1-rearrangements may remain unclassifiable. Design We retrospectively analyzed 41 Ewing-like tumors (formalin-fixed, paraffin-embedded) previously determined as negative or non-informative for EWSR1-rearrangements by FISH and/or RT-PCR. A new histopathology revision and additional IHC and molecular analyses were carried out in order to investigate whether additional IHC and/or molecular testing in combination with the morphological findings may help in reaching a definitive d…

AdultMale0301 basic medicinePathologymedicine.medical_specialtyAdolescentDesmoplastic small-round-cell tumorSarcoma EwingSclerosing rhabdomyosarcomaImmunophenotypingPathology and Forensic MedicineYoung Adult03 medical and health sciences0302 clinical medicineBiomarkers TumormedicineHumansStromal tumorChildAgedRetrospective StudiesHomeodomain ProteinsGiSTbusiness.industryNuclear ProteinsCell DifferentiationGeneral MedicineMiddle AgedPrognosismedicine.diseaseImmunohistochemistrySynovial sarcomaMolecular TypingHomeobox Protein Nkx-2.2030104 developmental biology030220 oncology & carcinogenesisSarcoma Small CellFemaleSarcomaClear-cell sarcomaRNA-Binding Protein EWSbusinessTranscription FactorsMyoepithelial TumorAnnals of Diagnostic Pathology
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Immunohistochemical Study as a Tool in Differential Diagnosis of Pediatric Malignant Rhabdoid Tumor

2010

Malignant rhabdoid tumors (MRTs) are aggressive childhood neoplasms, occurring mainly in the kidney and brain. We describe 2 unusual cases of extrarenal and noncranial location (liver and soft tissue with dissemination) mimicking hepatoblastoma, neuroblastoma or Ewing sarcoma. Both cases revealed a polyphenotypic profile, combined with cytokeratin, vimentin, and CD99 expression. INI1/BAF-47 showed negative protein nuclear expression in both cases, suggesting a diagnosis of MRT. An extensive immunohistochemical panel was performed to exclude pediatric tumors reminiscent of MRT. The genetic studies failed to detected MYCN amplification, 11q23 deletion, and EWS break-apart positivity. No alter…

HepatoblastomaPathologymedicine.medical_specialtySkin NeoplasmsHistologyDesmoplastic small-round-cell tumorChromosomal Proteins Non-HistoneCD9912E7 AntigenN-Myc Proto-Oncogene ProteinPathology and Forensic MedicineDiagnosis DifferentialNeoplasms Multiple PrimaryFatal OutcomeAntigens CDNeuroblastomaAntineoplastic Combined Chemotherapy ProtocolsmedicineHumansVimentinRhabdoid TumorChromosome AberrationsOncogene ProteinsN-Myc Proto-Oncogene Proteinbusiness.industryLiver NeoplasmsInfant NewbornInfantNuclear ProteinsWilms' tumorSMARCB1 Proteinmedicine.diseaseImmunohistochemistryDNA-Binding ProteinsMedical Laboratory TechnologyDrug Resistance NeoplasmKeratinsFemaleSarcomaRNA-Binding Protein EWSDifferential diagnosisbusinessCell Adhesion MoleculesTranscription FactorsApplied Immunohistochemistry & Molecular Morphology
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