A perivascular epithelioid cell tumor (PEComa) is a rare mesenchymal neoplasm composed of perivascular epithelioid cells with distinctive histologic, immunohistochemical, and genetic features. PEComas arising from various anatomical sites have been reported, but gastrointestinal PEComas are extremely rare entities. Here, we discuss the clinical and pathological features of a gastrointestinal PEComa with a transcription factor E3 (TFE3) translocation in a 17-year old adolescent male with a clinical presentation of abdominal pain and gastrointestinal bleeding. Our case report provides insight into this rare entity as well as discusses the pathophysiological aspects of TFE3-SFPQ-associated GI PEComas and their management.
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http://dx.doi.org/10.1155/2022/7519456 | DOI Listing |
Cureus
December 2024
Pathology and Laboratory Medicine, Saint Michael's Medical Center, Newark, USA.
Perivascular epithelioid cell tumors (PEComas) are a rare group of mesenchymal neoplasms composed of perivascular epithelioid cells. While commonly found in the kidney, uterus, and soft tissues, PEComas of the liver are exceedingly rare. We present a case of a PEComa incidentally discovered in a 73-year-old female patient undergoing evaluation for abdominal pain.
View Article and Find Full Text PDFArch Esp Urol
December 2024
Department of Urology, Kocaeli University Faculty of Medicine, 41001 İzmit, Turkey.
Background: Perivascular epithelioid-cell tumour (PEComa) is a rare mesenchymal tumour with low malignant potential. PEComa can be found in many organs throughout the body. In the urinary system, it can be found in the prostate, bladder, and kidney.
View Article and Find Full Text PDFClin J Gastroenterol
January 2025
Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Japan.
A 55-year-old man with tuberous sclerosis complex (TSC) was diagnosed with left renal angiomyolipoma (AML), a group of perivascular epithelioid cell tumors called PEComas. He had received the mTOR inhibitor everolimus, which resulted in a complete response. However, a left renal mass relapsed in two years, followed by the occurrence of a hepatic mass five months later.
View Article and Find Full Text PDFFront Oncol
December 2024
Department of Obstetrics and Gynecology, The International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.
The distinction between a uterine leiomyosarcoma (uLMS) and a perivascular epithelioid cell neoplasm (PEComa) can be quite challenging. Here we report a 39-year-old woman who underwent a hysteroscopic myomectomy. An intraoperative frozen section pathological examination revealed that the mass was likely to be a mesenchymal malignancy.
View Article and Find Full Text PDFIn Vivo
December 2024
Department of Pathology and Translational Genomics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
Background/aim: Lymphangioleiomyomatosis (LAM) belongs to the perivascular epithelioid cell tumor (PEComa) family. The relationship between LAM and tuberous sclerosis complex (TSC) is of particular concern in a subset of women with clinically occult LAM involving the pelvic lymph nodes. This study aimed to investigate the clinicopathological features of incidental nodal LAM detected during the surgical staging of gynecological tumors.
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