Primary hepatic clear cell myomelanocytic tumor. Case report and review of the literature

APMIS. 2007 Dec;115(12):1454-9. doi: 10.1111/j.1600-0463.2007.00733.x.

Abstract

A case of hepatic clear cell myomelanocytic tumor in a 31-year-old woman presenting clinically with abdominal pain is reported. Histopathologic examination showed a lesion characterized by a population of large epithelioid cells with clear or eosinophilic granular cytoplasm, rich in glycogen. Immunohistochemically, the tumor cells were positive for HMB-45, Melan-A and muscle-specific actin, but negative for epithelial markers, desmin, S-100 protein, and neuroendocrine markers. Ultrastructurally, the tumor cells had abundant glycogen, well-developed rough endoplasmic reticulum, microtubules and aberrant melanosomes. Clinical and pathologic features with a brief review of the relevant literature for hepatic CCMMT as a variant of perivascular epithelioid cell tumor (PEComa) are discussed.

Publication types

  • Case Reports

MeSH terms

  • Adult
  • Biomarkers, Tumor / analysis
  • Epithelioid Cells / pathology*
  • Female
  • Gallstones / pathology
  • Hepatectomy
  • Humans
  • Immunohistochemistry
  • Liver Neoplasms / metabolism
  • Liver Neoplasms / pathology*
  • Liver Neoplasms / surgery
  • Magnetic Resonance Imaging
  • Smooth Muscle Tumor / metabolism
  • Smooth Muscle Tumor / pathology*
  • Smooth Muscle Tumor / surgery

Substances

  • Biomarkers, Tumor