Results 41 to 50 of about 7,018 (165)

Multifocal Epithelioid Hemangioma With FOSB Overexpression

Journal of Cutaneous Pathology, EarlyView.
ABSTRACT Epithelioid hemangioma (EH) is a benign vascular tumor that most commonly arises on the skin but may also occur in other anatomical locations, including deep soft tissue, bone, visceral organs, penis, and mucosal sites. A hallmark of EH is overexpression of FOS and FOSB, often resulting from various gene fusions.
Phuong Daniels, Aarush Kumar, Alexa Lum, Izabelle Bermudez, Shannon DeSilva, Jonathan Crane, Kristopher McKay   +6 more
wiley   +1 more source

A rare case of primary lymphoma of the ciliary body – A case report

Indian Journal of Ophthalmology. Case Reports, 2023
A 73-year-old lady presented with complicated cataract, white tumor hypopyon, and an elevated, nonpigmented mass at the root of iris. Magnetic resonance imaging (MRI) revealed ciliary body involvement suspicious of atypical melanoma.
Mahesh Shanmugam Palanivelu, Shwetha Suryakanth, Rajesh Ramanjulu, Divyansh Kailashchandra Mishra, Surbhi Agrawal   +4 more
doaj   +1 more source

Out of the Ordinary, but Not Out of the Question: Atypia in Pancreatic Lesions Is Not Always Carcinoma

Cytopathology, EarlyView.
An incidental pancreatic lesion in a 69‐year‐old woman was sampled by EUS‐guided fine‐needle biopsy. Integrated cytopathological and histopathological evaluation with immunochemical staining supported organ‐preserving surgery. ABSTRACT Pancreatic perivascular epithelioid cell tumours (PEComas) are exceptionally rare mesenchymal neoplasms.
Maja Kebe Radulovic, Branislava Rankovic, Ajda Toni, Margareta Zlajpah, Darko Siuka   +4 more
wiley   +1 more source

UTILIDADE DO HMB-45 E DO KI-67 EM MELANOMA MALIGNO ASSOCIADO A NEVO

Revista da Sociedade Portuguesa de Dermatologia e Venereologia, 2011
Introdução: O melanoma maligno surge de novo na maioria das vezes, no entanto em cerca de um terço dos casos ocorre associado a um nevo pré-existente. Nestas situações pode haver dificuldade no diagnóstico histopatológico, particularmente na separação ...
Joana Gomes, Joana Parente, Isabel Viana, Esmeralda Vale   +3 more
doaj   +1 more source

Novel and emerging cutaneous soft tissue tumours

Histopathology, EarlyView.
This review outlines the defining histopathological, immunophenotypic and molecular features of novel and emerging cutaneous soft tissue tumours, including hybrid superficial ALK‐rearranged myxoid spindle cell neoplasm/epithelioid fibrous histiocytoma, superficial neurocristic tumour, ALK‐rearranged epithelioid vascular neoplasm and MITF pathway ...
Saba Shafi, Josephine K Dermawan
wiley   +1 more source

PNL2: A Useful Adjunct Biomarker to HMB45 in the Diagnosis of Uterine Perivascular Epithelioid Cell Tumor (PEComa)

, 2019
Perivascular epithelioid cell tumors (PEComa) are rare neoplasms characterized by co-expression of melanocytic and muscle markers. HMB45 and Melan-A are used to confirm a PEComa diagnosis; however, both are often focally expressed and sensitivity for ...
Andre Pinto, Anderson, William J, Pinto, Andre, Nucci, Marisa R, Trevisan, Giorgia, William J. Anderson, Aida Valencia-Guerrero, Hirsch, Michelle S, Giorgia Trevisan, Marisa R. Nucci, Valencia-Guerrero, Aida, Michelle S. Hirsch   +11 more
core   +1 more source

Superficial Ewing Sarcoma of the Rectum: A Case Report and the Utility of Molecular Diagnostics

Journal of Cutaneous Pathology, Volume 53, Issue 10, Page 917-920, October 2026.
ABSTRACT Ewing sarcoma is an undifferentiated small round cell sarcoma that most commonly presents as a malignant bone tumor in pediatric and young adult patients. The diagnosis is typically confirmed by molecular genetic identification of a fusion protein, most commonly involving members of the FET and ETS gene families.
Jessica L. Muldoon, Laura M. Warmke, Ahmed K. Alomari, Rachel P. Kowal   +3 more
wiley   +1 more source

New Observations on a Low‐Grade Diffusely Infiltrative Tumour, SMARCB1 Mutant, Arguing for a New Tumour Type

Neuropathology and Applied Neurobiology, Volume 52, Issue 5, October 2026.
Two new cases of low‐grade diffusely infiltrative tumour (LGDIT), SMARCB1 mutant, are described in an 18‐year‐old and a 50‐year‐old male, both with supratentorial lesions, characteristic rhabdoid histology on a myxoid‐collagenous background, and complete INI1 loss.
Alice Métais, Giorgia Antonia Simboli, Marc Barritault, Fabrice Chrétien, Julien Masliah‐Planchon, Alessandro Moiraghi, Johan Pallud, Laure Thomas, Pierre Leblond, Alexandre Bani‐Sadr, Raphaël Saffroy, Arnault Tauziède‐Espariat, Alexandre Vasiljevic, Pascale Varlet   +13 more
wiley   +1 more source

Epithelioid angiomyolipoma: a pathological entity discovered in Verona with the endorsement of Doctor Rosai

, 2021
In this manuscript, we summarize the main features of angiomyolipoma highlighting the recognition of epithelioid angiomyolipoma and the discovery of immunohistochemical expression of HMB45 in a group of tumors that now are referred to as as PEComas.
Marletta, Stefano, Bonetti, Franco, Martignoni, Guido, Brunelli, Matteo, Pea, Maurizio, Caliò, Anna, Zamboni, Giuseppe   +6 more
core   +1 more source

TFE3-Expressing Perivascular Epithelioid Cell Tumor of the Breast [PDF]

Journal of Pathology and Translational Medicine, 2019
Perivascular epithelioid cell tumor (PEComa) is a very rare mesenchymal tumor with a distinctive morphology and immunophenotype. PEComas usually harbor TSC2 alterations, although TFE3 translocations, which occur in MiT family translocation renal cell ...
Hyunjin Kim, Jimin Kim, Se Kyung Lee, Eun Yoon Cho, Soo Youn Cho   +4 more
doaj   +1 more source