What is the perineal body?

• A. A fat pad at the perineum
• B. A bony landmark
• C. A tendinous ring
• D. An irregular fibromuscular mass at the midpoint of the ischial tuberosities

Answer: (D)

The perineal body is a fibromuscular mass located in the midline of the perineum, roughly at the midpoint between the ischial tuberosities. It isn’t fat, bone, or a ring; rather, it serves as a central anchor where several pelvic floor muscles converge. Attachments here include the bulbospongiosus, external anal sphincter, and the superficial and deep transverse perineal muscles, with contributions from fibers of the levator ani. This convergence provides key support for the pelvic floor and helps maintain continence and organ positioning, especially under increased intra-abdominal pressure. Because of its central anchor role, injury or loss of integrity of the perineal body—such as during childbirth—can impact pelvic organ support.