Pseudounicornuate uterus is a rare, non-syndromic uterovaginal malformation characterized by a crescent-shaped, small-sized uterus containing a single horn and fallopian tube associated with a rudimentary second horn (which can be solid or contain a cavity with functioning endometrium and be communicating or non-communicating). Urinary tract anomalies are frequently associated. The disease is MONDO_0015833 (pseudounicornuate uterus). Also known as: incomplete unilateral Mullerian aplasia, incomplete unilateral Müllerian aplasia, incomplete unilateral aplasia of the Mullerian ducts, incomplete unilateral aplasia of the Müllerian ducts, unicornuate uterus with rudimentary horn.