Columbia subject headings:
Colon (Anatomy)--Cancer--Congresses.
Liver--Cancer--Congresses.
Metastasis--Congresses.
Rectum--Cancer--Congresses.
Harvard subject headings:
Colon (Anatomy)--Cancer--Congresses.
Liver--Cancer--Congresses
Metastasis--Congresses.
Rectal Neoplasms--Congresses.
Rectum--Cancer--Congresses.
Princeton subject headings: