Megacystis-Microcolon-Intestinal Hypoperistalsis Syndrome 3, is also known as mmihs3. An important gene associated with Megacystis-Microcolon-Intestinal Hypoperistalsis Syndrome 3 is LMOD1 (Leiomodin 1). Affiliated tissues include smooth muscle and heart, and related phenotypes are polyhydramnios and hydronephrosis