Marion's disease is due to:
Muscular hypertrophy of internal sphincter of urinary bladder
Fibrosis of the neck of bladder
Vesicular diverticula
Vesicular calculi
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.
Urethra & Penis