Urothelial Carcinoma - Micropapillary Variant

The majority of cases of micropapillary variant present with invasion of Detrusor muscle (shown here) at the time of presentation (Stage pT2). The hollow cores of some of the micropapillary structures create resemblance to glands when cut in cross sections. However, the glands in primary adenocarcinoma of bladder are more variable in their size and shape in contrast to the homogenous appearance of the micropapillary areas seen here.