Actg2 Visceral Myopathy, also known as familial visceral myopathy, is related to megacystis-microcolon-intestinal hypoperistalsis syndrome 1 and visceral myopathy 1. An important gene associated with Actg2 Visceral Myopathy is ACTG2 (Actin Gamma 2, Smooth Muscle). Affiliated tissues include smooth muscle and thyroid, and related phenotypes are vesicoureteral reflux and hydroureter