title: Hepatic perivascular epithelioid cell tumor: Case report and brief literature review.
abstract: BACKGROUND
  Perivascular epithelioid cell tumor (PEComa) is a rare mesenchymal neoplasm which expresses both myogenic and melanocytic markers. PEComas are found in a variety locations in the body, but up to now only approximately 30 cases about hepatic perivascular epithelioid cell tumor are reported in English language worldwide.
  
  
  METHODS
  A 32-year-old woman was admitted in our hospital with intermittent right upper quadrant pain for 1 month and recent (1 day) progressive deterioration.
  
  
  METHODS
  Based on the results of the laboratory examinations and the findings of the computed tomography, the diagnosis of hepatic hamartoma or the hepatocecullar carcinoma with hemorrhage was made.
  
  
  METHODS
  The patient underwent a segmentectomy of the liver, and the finally diagnosis of hepatic PEComa was made with immunohistochemical confirmation with HMB-45 and SMA.
  
  
  RESULTS
  There is no clinical or radiographic evidence of recurrence 9 months after surgery.
  
  
  CONCLUSIONS
  This kind of tumor is extremely rare and the natural history of PEComa is uncertain, as the treatment protocol for hepatic PEComa has not reached a consensus. But the main treatment of the disease may be surgical resection. Only after long term follow-up can we know whether the tumor is benign or malignant. It appears that longer clinical follow-up is necessary in all patients with hepatic PEComas.
authors.affiliation: Department of General Surgery, Second Xiangya Hospital, Central South University Department of General Surgery, the First Hospital of Hunan University of Chinese Medicine, Changsha, Hunan, P.R. China.
authors.forename: Da
authors.initials: D
authors.lastname: Tang
authors.forename: Jianmin
authors.initials: J
authors.lastname: Wang
authors.forename: Yuepeng
authors.initials: Y
authors.lastname: Tian
authors.forename: Qiuguo
authors.initials: Q
authors.lastname: Li
authors.forename: Haixiong
authors.initials: H
authors.lastname: Yan
authors.forename: Biao
authors.initials: B
authors.lastname: Wang
authors.forename: Li
authors.initials: L
authors.lastname: Xiong
authors.forename: Qinglong
authors.initials: Q
authors.lastname: Li
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D008099:Liver / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D008113:Liver Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D054973:Perivascular Epithelioid Cell Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D014057:Tomography, X-Ray Computed