Surgery – MCQ 49 – Acquired (secondary) megacolon

In which of the following conditions acquired (secondary) megacolon is seen?
a) Fissure in-ano
b) Complete absence of parasympathetic ganglion cells
c) Absence of sympathetic ganglion cells
d) Rectal malignancy

Correct answer :
d) Rectal malignancy

Absence of ganglion cells result in congenital megacolon. Fissure in ano causes anal sphincter spasm, but does not result in megacolon. Rectal malignancies cause luminal obstruction leading to development of megacolon.

Read more : Causes of acquired megacolon

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Causes of acquired megacolon

Chagas disease - caused by Trypanosoma cruzi Anticholinergic drugs Rectal malignancy - causes luminal obstruction leading to development of megacolon...