Uterus Septus Subtotalis Bicollis: A Rare Mullerian Duct Abnormality

Mullerian duct anomalies (MDAs) are congenital defects of the female genital system that arise from abnormal embryological development of the Mullerian ducts. Septate uterus is the most common, resulting from incomplete resorption of the medial septum after fusion of the Mullerian ducts. Two main types of septate uterus exist, including septa that extend completely or partially from the uterine fundus to the cervical os. The combination of a uterine septum with a double cervix has been previously described; however, in most cases the septum was complete. We present a case of a 23-year-old female with a partial uterine septum and a double cervix. We refer to this atypical MDA as "uterus septus subtotalis bicollis". The description, characterization, and diagnosis of rare MDAs is important as they imply distinct therapeutic modalities.