FIG. 3. A. Diagrammatic representation of a wedge resection of the intracavernosal tissue showing the condition of the arteries, veins and constricted sinus spaces of the penis in the flaccid state. B. Diagrammatic representation of a wedge-shaped intracavernosal space during the erect state with relaxation of the sinus smooth muscles allowing for engorgement of the sinus spaces and collapse of the subtunical veins with flattening and collapsing of the emissary veins leading to poor or little flow to the circumflex veins.