Figure 13

(a) Invasive high-grade urothelial carcinoma (prostatic urethral origin) with prostatic stromal invasion arising in a background of extensive urothelial carcinoma in situ with colonization of prostatic ducts and acini (captured component). Radical cystoprostatectomy (× 4 magnification). (b) Invasive high-grade urothelial carcinoma (prostatic urethral origin) with prostatic stromal invasion. Foci of adjacent urothelial carcinoma in situ with colonization of prostatic ducts and acini are also present. Radical cystoprostatectomy (× 10 magnification).