The vesico‐ureteric junction in three cases of primary obstructive megaureter associated with ectopic

Abstract

The presence of an additional smooth muscle collar surrounding the terminal ureter may impede the normal flow of urine from ureter to bladder and be the cause of megaureter in these patients. We propose that the presence of this muscular collar arises from the developmental anomaly and suggest that these cases represent a subgroup that requires early surgical treatment.