Marion's disease is due to:: (A) Muscular hypertrophy of internal sphincter of urinary bladder, (B) Fibrosis of the neck of bladder, (C) Vesicular diverticula, (D) Vesicular calculi
Answer is A. Ans. (a) Muscular hypertrophy of internal sphincter of urinary bladder* Congenital hypertrophy of the posterior urethra due to muscular hypertrophy and stenosis at bladder neck is known as Marion's disease.