Persistent Mullerian duct syndrome (PMDS) is a rare form of a 46,XY disorder of sex development, in which remnants of Mullerian ducts are seen in phenotypically normal males. The syndrome is caused either by a mutation in the Anti-Mullerian hormone (AMH) gene or the AMH receptor gene (AMHR2). AMH is secreted mainly by immature Sertoli cells at the time of sex differentiation in fetal life, and have a role in the regression of Mullerian ducts.
