Fig. 3From: Cystic papillary adenoma of the seminal vesiclea Low magnification of cystadenoma arising in the seminal vesicle. The seminal vesicle wall and lining is at the left side of the image. b Higher magnification of cribriform and papillary growth pattern with most cells showing bland morphology with scattered larger atypical nuclei with a degenerative appearance (arrows). Inset shows degenerative atypia with smudgy chromatin lacking mitotic activity. c PAX 8 immunoreactivity in the normal seminal vesicle epithelium (left) and in the cystadenoma. d Ki67 showing scattered positive cells, but the larger cells with degenerative atypia (arrows) show a lack of ki67 stainingBack to article page