چکیده (انگلیسی):

Perivascular epithelioid cell tumor (PEComa) is a rare tumor. Here, we present
data regarding clinical presentations, diagnoses, management, and prognosis of five cases of
hepatic PEComa between January 2002 and December 2008. Ultrasonography showed hyperechoic
masses in all patients. Precontrast computed tomography (CT) showed that all lesions
scanned were heterogeneous in density and were heterogeneously enhanced in arterial phase
images. In two cases, magnetic resonance imaging showed hypointensity on T1-weighted
images and hyperintensity on T2-weighted images. In enhanced scanning, lesions showed
asymmetrical enhancement during arterial phase imaging. All tumors were composed of
varying proportions of smooth muscle, adipose tissue, and thick-walled blood vessels, and
showed positive immunohistochemical staining for Human Melanoma Black-45. All patients
underwent hepatectomy, and there was no evidence of recurrence or metastasis during the
follow-up period.