Botryoid Wilms' tumor: report of two cases.

Background: Botryoid Wilms' tumor is a rare kind of Wilms' tumor. We report two cases of this tumor.

Methods: Case 1, a 2-year-old boy, was admitted with macrohematuria for 5 months.

Arterial phase of biphase enhancement spiral CT in diagnosis of small hepatocellular carcinoma.

Objectives: To evaluate the value of the arterial Phase (AP) of biphase enhanced spiral CT (SCT) in the diagnosis of small HCC and to investigate the criteria, initial time, ending time and duration of AP.

Methods: From May 1995 to March 1999, patients with small HCC proved surgically and pathologically including 49 patients (n=53) in group A, 148 (n=186) in group B and 52 (n=52) in group C were collected. Biphase dynamic enhanced SCT scans were performed in all patients of the three groups and additional single-level dynamic scans only done in the group C.