Columbia subject headings:
Colon (Anatomy)--Diseases--Treatment.
Colon (Anatomy)--Surgery.
Rectum--Diseases--Treatment.
Rectum--Surgery.
Harvard subject headings:
Colon (Anatomy)--Diseases--Treatment.
Colon (Anatomy)--Surgery.
Rectum--Diseases--Treatment.
Rectum--Surgery.
Princeton subject headings: