Tumour cells in the blood with special reference to pre- and post-hepatic blood.
D041981:Gastrointestinal Tract; D006402:Hematologic Diseases; D006801:Humans; D008099:Liver / Q000502:physiology*; D009369:Neoplasms / Q000097:blood*
GASTROINTESTINAL SYSTEM/neoplasms; LIVER/physiology; NEOPLASMS/blood in