title: Clear cell myomelanocytic tumor of the falciform ligament/ligamentum teres.
abstract: Clear cell myomelanocytic tumors (CCMTs) of the falciform ligament/ligamentum teres are extremely rare. CCMTs are a variant of perivascular epithelioid cell tumors. We present a case of hepatic CCMT in a 54-year-old woman with abdominal pain. The patient had an 8.8 cm well-demarcated tumor in the right lobe of the liver. Contrast-enhanced computed tomography showed a heterogeneous mass that enhanced significantly in the arterial and portal venous phases, and was less enhanced in the delayed phase. The patient underwent a right hemihepatectomy and cholecystectomy. The tumor cells had clear to slightly eosinophilic cytoplasm, vesicular nuclei, and were positive for HMB-45 and smooth muscle actin. The patient had no recurrence after 36 months follow-up. A review of the literature identified 10 hepatic CCMTs. Hepatic CCMTs are usually benign tumors of young women that present as large masses located in the right lobe of the liver.
authors.forename: Yan
authors.initials: Y
authors.lastname: Tan
authors.affiliation: Department of Radiology, First Clinical Medical College, Shanxi Medical University, Taiyuan 030001, Shanxi Province, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Zhang
authors.forename: Xiao-Chun
authors.initials: XC
authors.lastname: Wang
mesh_terms: D000199:Actins / Q000032:analysis; D014408:Biomarkers, Tumor / Q000032:analysis; D002763:Cholecystectomy; D005260:Female; D006498:Hepatectomy; D006651:Histocytochemistry; D006801:Humans; D007150:Immunohistochemistry; D008022:Ligaments / Q000473:pathology*; D008113:Liver Neoplasms / Q000175:diagnosis* / Q000473:pathology* / Q000601:surgery; D058950:Melanoma-Specific Antigens / Q000032:analysis; D008853:Microscopy; D008875:Middle Aged; D054973:Perivascular Epithelioid Cell Neoplasms / Q000175:diagnosis* / Q000473:pathology* / Q000601:surgery; D011860:Radiography, Abdominal; D014057:Tomography, X-Ray Computed; D058951:gp100 Melanoma Antigen
chemical_list: D000199:Actins; D014408:Biomarkers, Tumor; D058950:Melanoma-Specific Antigens; C548637:PMEL protein, human; D058951:gp100 Melanoma Antigen