This organ is the subject of the D’Amico risk classification, and it is reduced in size using steam in Rezum Water Vapor Therapy. Patrick C. Walsh developed “radical” techniques to remove this organ using an incision in either the abdomen or perineum. (-5[1])This organ is studied using the PC3, D·U·145, and L·N·C·a·P cell lines. A disease of this organ is scored from one to five on the (*) Gleason scale, and is similar to a namesake type of benign hyperplasia. (-5[1])Secretions from this organ include zinc and kallikrein-3, its namesake “specific antigen,” and make up about 30% of semen. The back wall of this accessory gland is felt for enlargement with a gloved, lubricated finger (10[1])in a digital rectal exam. For 10 points, name this walnut-shaped reproductive gland, the site of the most common cancer in males. (10[1])■END■ (10[1]0[1])