Monosegmental Hepatobiliary Fibropolycystic Disease Mimicking a Mass: Report of Three Cases
A 50-year-old man presented with incidentally discovered hepatic mass in the right lobe of the liver, during evaluation of sigmoid colon cancer. The laboratory tests showed no abnormal findings, and physical examination was normal. The evidence of polycystic kidney or liver disease was absent. No family history of polycystic kidney or liver disease was recognized. Ultrasound showed an ill-defined echogenic mass with multiple varying-sized cystic components in the right lobe of the liver (). A three-phase abdominal CT scan showed an irregularly-marginated mass with tubular components but with no contrast enhancement (). MR imaging showed a cystic mass with very high T2 signal intensities (). Post-contrast MR image showed a cystic mass with no contrast enhancement (). 3 dimensional magnetic resonance cholangiopancreatography (MRCP) showed a cystic mass with tubular and cystic components (). The remaining liver was normal. Anterior resection of sigmoid colon cancer was performed, and TNM staging according to the American Joint Committee on Cancer was a stage II lesion (T2N0M0). A follow-up imaging study 18 months later showed no interval change of this cystic mass.