Bleeding disorders. Finding the cause.
D001778:Blood Coagulation Disorders / Q000150:complications* / Q000175:diagnosis; D001780:Blood Coagulation Tests; D003110:Colonic Neoplasms / Q000150:complications*; D003937:Diagnosis, Differential; D006471:Gastrointestinal Hemorrhage / Q000097:blood / Q000209:etiology*; D006487:Hemostasis; D006801:Humans; D008297:Male; D008487:Medical History Taking; D008875:Middle Aged; D010808:Physical Examination