Recurrent Villous Adenoma with High-Grade Dysplasia Arising in a Urethral Diverticulum

Figure 1

(a) Papillary fronds with delicate fibrovascular core (H&E, X20); (b) border of villous adenoma with squamous epithelium in the urethral diverticulum (H&E, X40); (c) columnar epithelium with abundant goblet cells demonstrating nuclear stratification, surface mitotic figures and loss of polarity (H&E, X100); (d) abundant mitosis, including atypical forms (H&E, X400).

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(b)

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