Abstract
(1) Painful peristalsis of the colon or pyloric spasm immediately after food in the presence of growth, may lead to the faulty diagnosis of an upper abdominal lesion. (2) Cancers of the lower colon and rectum are external cancers from the diagnostic point of view. (3) Digital and sigmoidoscopic examinations are too infrequently made. (4) Cancers of the hepatic and splenic flexures are best palpated with the patient in the erect stooping position. (5) Cancer patients develop a certain degree of immunity, but the possibility of more than one independent growth should be considered. (6) Palpable peristalsis is a reliable sign of obstruction in the colon: teasing tenesmus is a constant symptom of rectal growths.
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