“…Based on the few cases thus far reported in the literature [1,2,[5][6][7][8]12,13], foamy gland adenocarcinoma of the prostate might be considered an uncommon variant of usual acinar adenocarcinoma; but incidence data have not been previously gathered. In the 2 separate series we report here, foamy gland carcinoma, as a component of usual acinar adenocarcinoma, is present in 15% to 23% of clinically organ-confined prostatic carcinomas.…”