Figure 3.

Composite of prostatic adenocarcinomas with papillary architecture: (A) classical ductal (‘endometrioid’) carcinoma, characterised by papillary formations, lined by tall columnar neoplastic cells, (B) papillary formations lined by tumour cells resembling benign prostate glandular luminal cells in a pseudohyperplastic variant carcinoma, (C,D) papillary formations protruding into larger cystic spaces and lined by columnar luminal cells with round (basal) nuclei (C) or with apical nuclei (D) distinct from the ductal adenocarcinoma as shown in (A).