Localized hyaline plaque of the diaphragmatic peritoneum: report of a rare entity mimicking a hepatic tumor.

A liver tumor (2.5x3 cm) with malignant features on computed tomography (CT) and magnetic resonance imaging (MRI) was detected in a 69-year-old man with hepatitis B virus (HBV)-associated cirrhosis. On exploratory laparotomy a mass at the right diaphragmatic dome adherent to the liver segment VIII was found. En-block resection of this segment and the part at diaphragm hosting the tumor was carried out. On histology the tumor was a diaphragmatic hyaline plaque while in the resected liver no tumor was found.