plural of myotomy

(surgery) The surgical procedure of cutting or making an incision in a muscle or muscular organ. / (dated) An anatomical dissection of a body, especially one used for instructional purposes.

plural of Heller myotomy

A surgical procedure, used to treat achalasia, in which the muscles of the cardia (lower esophageal sphincter) are cut, allowing food and liquids to pass to the stomach.