[A case of gallbladder metastasis from a malignant perivascular epithelioid cell tumor of the bladder].

Abstract

The perivascular epithelioid cell family of tumors (PEComas) includes common lesions such as angiomyolipomas, lymphangioleiomyomas, and clear cell "sugar" tumors of the lung. Less frequently, PEComas arise in various other locations throughout the body, including the soft tissue, bone, and the visceral organs. We report the case of a 64-year-old man who underwent total cystectomy because of a primary malignant PEComa of the bladder in August 2010. The patient was treated with the mammalian target of rapamycin inhibitor for lung and bone metastasis from April 2011 and showed stable disease. Computed tomography showed a growing mass in the neck of the gallbladder 5 months later, which was suspected to be gallbladder cancer. Cholecystectomy and lymphadenectomy was performed in February 2012, and histopathological examination indicated gallbladder metastasis from the primary malignant PEComa of the bladder. This is, to our knowledge, the first report of malignant PEComa metastasis to the gallbladder.

• Authors: Hiroyoshi Sendo, Hitoshi Harada, Hiroshi Hasegawa, Takashi Yasuda, Tadayuki Ohara, Taro Oshikiri, Kenichi Tanaka, Yasuhiro Fujino, Masahiro Tominaga
• Journal: Nihon Shokakibyo Gakkai zasshi = The Japanese journal of gastro-enterology (Nihon Shokakibyo Gakkai Zasshi) Vol. 110 Issue 5 Pg. 861-8 (May 2013) ISSN: 0446-6586 [Print] Japan
• PMID: 23648543 (Publication Type: Case Reports, English Abstract, Journal Article)

Topics

• Gallbladder Neoplasms (pathology, secondary)
• Humans
• Male
• Middle Aged
• Perivascular Epithelioid Cell Neoplasms (pathology)
• Urinary Bladder Neoplasms (pathology)