Lateral internal sphincterotomy is an operation performed on the internal anal sphincter muscle for the treatment of chronic anal fissure.

Laryngectomy is the removal of the larynx and separation of the airway from the mouth, nose and esophagus.

A laparotomy is a surgical procedure involving a large incision through the abdominal wall to gain access into the abdominal cavity.

Laparoscopy (from Ancient Greek λαπάρα (lapara), meaning ‘flank, side’, and σκοπέω (skopeo), meaning ‘to see’) is an operation performed in the abdomen or pelvis through small incisions (usually 0.

A laminotomy is an orthopaedic neurosurgical procedure that removes part of the lamina of a vertebral arch in order to relieve pressure in the vertebral canal.