Surgery All are true regarding rectal carcinoma EXCEPT: A Early morning spurious diarrhea and tenesmus can occur B Adenocarcinoma is a rare variant of rectal carcinoma. C Growth confined to the rectal mucosa is stage A of modified Duke's staging. D Hamann's operation is done in old debilitated patients. 💡 Explanation All are true regarding rectal carcinoma EXCEPT: ✓ Correct Answer: B. Adenocarcinoma is a rare variant of rectal carcinoma.