Verrucous carcinoma of the bladder.

Verrucous carcinoma is a rare squamous cell variant that may arise in the bladder. We present a case of verrucous carcinoma of the bladder with radiologic-pathologic correlations that demonstrate the characteristic frond-like growth pattern. Verrucous carcinoma is an invasive but not a metastizing lesion, and therefore recognizing this lesion may have prognostic and therapeutic implications.