We report a case of perivascular epithelioid cell tumor arising in the rectum of a 55-year-old woman. The tumor was treated by transanal endoscopic microsurgery. After 1 year follow-up, the patient is alive with no radiologic or endoscopic evidence of recurrence. Perivascular epithelioid cell tumor is a rare mesenchymal tumor characterized by co-expression of melanocytic and smooth muscle markers. This rare tumor can arise in various organs, including the falciform ligament, uterus, uterine cervix, liver, kidney, lung, breast, cardiac septum, pancreas, prostate, thigh, and gastrointestinal tract. Perivascular epithelioid cell tumor of the gastrointestinal tract is very rare, with only 23 previously reported cases. We review the literature on perivascular epithelioid cell tumors arising in the gastrointestinal tract.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3896964 | PMC |
http://dx.doi.org/10.1186/1477-7819-12-12 | DOI Listing |
Radiology
January 2025
From the Department of Radiology, Hospital Alemán, Avenida Pueyrredón 1640, Buenos Aires, Argentina.
Fam Cancer
January 2025
Department of Pediatrics, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan.
Perivascular epithelioid cell tumors (PEComas) belong to a family of rare mesenchymal tumors composed of histologically and immunohistochemically distinctive perivascular epithelioid cells. Li-Fraumeni syndrome (LFS), an autosomal dominant cancer predisposition syndrome, is caused by a germline variant of the tumor suppressor gene TP53. Here, we report the case of a 20-year-old woman with LFS who developed a PEComa of the liver.
View Article and Find Full Text PDFSAGE Open Med Case Rep
January 2025
Department of Hepatobiliary Pancreatic and Splenic Surgery Ward Ⅰ, The Affiliated ChuZhou Hospital of Anhui Medical University (The First People's Hospital of Chuzhou), ChuZhou, China.
Hepatic epithelioid angiomyolipoma is a rare mesenchymal liver tumor within the perivascular epithelioid cell tumor family, known for its uncertain malignancy and potential for aggressive behavior. Clinical presentation, laboratory findings, and imaging results lack specificity, making pathological examination critical for definitive diagnosis. This case report presents a 61-year-old male patient with a single tumor in the right liver lobe, measuring approximately 101 mm × 99 mm.
View Article and Find Full Text PDFAm J Surg Pathol
January 2025
Departments of Pathology.
Proliferations of neoplastic perivascular epithelioid cells (PECs) may occur within the lung and extrathoracic sites. The term "PEComatosis" is applied to multiple or diffuse microscopic proliferations of neoplastic PECs. Pulmonary diffuse PEComatosis is extremely rare, with only one case documented in the literature to date.
View Article and Find Full Text PDFDiagn Pathol
January 2025
Department of Diagnostic Pathology, National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan.
Background: Perivascular epithelioid cell tumors (PEComas) rarely appear in the head and neck region. This case report describes two transcription factor E3 (TFE3)-rearranged PEComa cases, consisting of one in the orbit and one in the nasal cavity.
Case Presentation: Both cases demonstrated sheet-like or focal nested architecture and comprised epithelioid cells with abundant clear to eosinophilic cytoplasm and vascular stroma.
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