Case Report

A Rare Cause of Urachal Adenocarcinoma: Urachal Diverticle

Figure 3

Microscopic examination revealed that the tumor has arised from a villous adenoma of the urachus. The pictures show that villous projections which were lined by columnar mucinous epithelium having pronounced nuclear and architectural atypia (a) and invasive area into the muscle wall (b).