Survey of cancer of the digestive tract.
D001005:Anus Neoplasms / Q000453:epidemiology; D003110:Colonic Neoplasms / Q000453:epidemiology; D003937:Diagnosis, Differential; D004938:Esophageal Neoplasms / Q000453:epidemiology; D005770:Gastrointestinal Neoplasms / Q000175:diagnosis / Q000453:epidemiology*; D006801:Humans; D007414:Intestinal Neoplasms / Q000453:epidemiology; D007421:Intestine, Small; D012004:Rectal Neoplasms / Q000453:epidemiology; D013274:Stomach Neoplasms / Q000453:epidemiology; D014481:United States