Sigmoidostomy is the establishment of an artificial anus by surgically creating an opening into the sigmoid colon.

A sinusotomy is a surgical operation in which an incision is made in a sinus to prevent or reduce inflammation.

Skin biopsy is a biopsy technique in which a skin lesion is removed to be sent to a pathologist to render a microscopic diagnosis.

Anal sphincterotomy is a surgical procedure that involves treating mucosal fissures from the anal canal/sphincter.

Spleen transplantation is the transfer of spleen or spleen fragments from one individual to another.