Results 21 to 30 of about 4,316 (128)

Primary Perivascular Epithelioid Cell Tumor of the Lung: A Case Report

Journal of Chest Surgery, 2023
Perivascular epithelioid cell tumors (PEComas) are very rare mesenchymal neoplasms, composed of histologically and immunohistochemically distinctive cells that form a sheetlike appearance around vessel lumens.
Hye Rim Na, Jong Hui Suh, Jiyun Lee
doaj   +1 more source

An Unusual Combination of Biliary Cystadenoma and Renal Angiomyolipoma- A Case Report [PDF]

Journal of Clinical and Diagnostic Research, 2016
Hepatobiliary cystadenomas are mucinous cystic neoplasms arising in the liver, extrahepatic bile ducts or gall bladder. Extrahepatic cystadenomas are rare neoplasms requiring complete excision as there is a chance for recurrence and malignant ...
Sheeja Sainulabdeen, Renu Thambi, Sylvia Syriac, Anil Kumar   +3 more
doaj   +1 more source

Sclerosing Perivascular Epithelioid Cell Tumor of the Lung: A Case Report with Cytologic Findings [PDF]

Journal of Pathology and Translational Medicine, 2016
Benign perivascular epithelioid cell tumor (PEComa) of the lung is a rare benign neoplasm, a sclerosing variant of which is even rarer. We present a case of 51-year-old man who was diagnosed with benign sclerosing PEComa by percutaneous fine needle ...
Ha Yeon Kim, Jin Hyuk Choi, Hye Seung Lee, Yoo Jin Choi, Aeree Kim, Han Kyeom Kim   +5 more
doaj   +1 more source

Perivascular epithelioid cell tumor (PEComa) of the uterine cervix associated with intraabdominal "PEComatosis": A clinicopathological study with comparative genomic hybridization analysis

World Journal of Surgical Oncology, 2004
Background The World Health Organization recently recognized a family of neoplasms showing at least partial morphological or immunohistochemical evidence of a putative perivascular epithelioid cell (PEC) differentiation.
Ma Linglei, Mariappan M Rajan, Yilmaz Yesim, Parkash Vinita, Fadare Oluwole, Hileeto Denise, Qumsiyeh Mazin B, Hui Pei   +7 more
doaj   +1 more source

Primary Pulmonary Mesenchymal Neoplasm With EWSR1::CREM Fusion: Cytologic Findings and Molecular Diagnosis

Diagnostic Cytopathology, EarlyView.
ABSTRACT Background Primary pulmonary mesenchymal neoplasms with EWSR1::CREM fusion are rare. These lesions are challenging to diagnose by morphology and immunohistochemistry alone. Case A 66‐year‐old woman (ex‐smoker) was found to have a 1.3‐cm right lower lobe lung nodule that had grown very slowly over a 9‐year period.
Priya Upadhyay, Sanjay Mukhopadhyay, Swikrity U. Baskota   +2 more
wiley   +1 more source

A Rare Case of Malignant Perivascular Epithelioid Cell Tumor Mimicking Ovarian Cancer

Turkish Journal of Colorectal Disease
Lower gastrointestinal bleeding is defined as bleeding that originates distal to the ligament of Treitz. Neoplasms causing lower gastrointestinal bleeding generally originate from the colon.
Sami Acar, Çağıl Karaevli
doaj   +1 more source

Perivascular Epithelioid Cell Tumor (PEComa) of the Sigmoid Colon: Case Report and Literature Review

Current Oncology
Perivascular epithelioid cell tumors (PEComas) are rare mesenchymal neoplasms characterized by perivascular epithelioid cell proliferation. They can occur in various organs, but colonic PEComas are exceptionally rare, showing diagnostic challenges due to
Gintare Slice, Rokas Stulpinas, Tomas Poskus, Marius Kryzauskas   +3 more
doaj   +1 more source

Case report: ALK-rearranged spindle and epithelioid cell neoplasms with S100 and CD34 co-expression: Additional evidence of kinase fusion–positive soft tissue tumors

Frontiers in Oncology, 2022
ALK rearrangements have rarely been reported in S100- and CD34-co-expressing soft tissue neoplasms with lipofibromatosis-like neural tumor (LPFNT) pattern or stromal and perivascular hyalinization, mimicking NTRK-rearranged spindle cell tumors.
Shao-Jie Sheng, Shao-Jie Sheng, Ju-Ming Li, Qin-He Fan, Yang Liu, Shao-Yu Chen, Ming Zhao, Qi-Xing Gong   +7 more
doaj   +1 more source

Mapping the Tissue Architecture and Endothelial‐PEC Network in HAML Using Single‐Cell and Spatial Transcriptomics

Cancer Science, EarlyView.
Spatial multi‐omics mapping of hepatic angiomyolipoma reveals that PEComas tightly co‐localize with endothelial cells, which drive autophagic flux in adjacent tumor cells via a paracrine PDGFD–PDGFRB–Ras axis, establishing a compensatory survival network that operates in parallel to canonical TSC–mTOR defects.
Xinyang Liu, Yang Guo, Xuehong Tie, Yu Liu, Fuyu Li, Jingkai Liu, Xiaohang Sun, Jiajun Zhao, Feng Geng, Yingjian Liang   +9 more
wiley   +1 more source

Canine hemangiopericytomas: cell proliferation and apoptosis in the perivascular, storiform and epithelioid histological subtypes and their significance for prognosis.

Brazilian Journal of Veterinary Pathology, 2009
Canine hemangiopericytomas (CHP) are soft tissue neoplasms, originary from pericytes. They are frequently diagnosed in dogs and can be seen more frequently in limbs as circumscribed and firm nodules.
Stefanie V. Santos, Luciana N. Torres, Tereza C. da Silva, Lilian R. M. de Sá, Júlia M. Matera, Maria L. Z. Dagli   +5 more
doaj   +1 more source