Rectum Section Fistula

Description

A cross section of the rectum and anal canal showing an anal fistula, an abnormal tract connecting the anal canal to the perianal skin. The internal opening typically sits at the dentate line where an infected anal gland originated, and the external opening appears on the perianal skin surface. Anal fistulae are classified by their relationship to the sphincter complex: intersphincteric, transsphincteric, suprasphincteric, or extrasphincteric. The tract's path through or around the sphincters determines the surgical approach, since dividing too much sphincter muscle risks incontinence. The model supports colorectal surgery education and patient counseling. Reviewed by a medical advisory board. Ready for rendering, real-time, and 3D printing.