The subcutaneous perineal pouch is an anatomical region of the body that contains various tissues and structures. It is also known by other synonyms, including ischioanal fossa, perianal space, and anal triangle. The ischioanal fossa is a region below the pelvic diaphragm and is bordered by the skin, pelvic bone, and muscles. The perianal space is a subcutaneous area located around the anus, and the anal triangle is the area between the coccyx, ischial tuberosities, and anus. Knowing the different synonyms for subcutaneous perineal pouch helps medical professionals communicate and understand the region's location and structures, especially when discussing medical procedures or conditions.