Robert's uterus is a rare form of Müllerian duct anomaly and a subtype of the asymmetric septated uterus that has a blind hemicavity with unilateral hematometra due to obstruction by the septum and contralateral uterine cavity connecting to the cervix with normal external uterine fundus contour and may be associated with ipsilateral hematosalpinx and or endometrioma.

Patients present with recurrent abdominal pain and severe dysmenorrhea. 

MRI is the imaging modality of choice for the diagnosis with the coronal T2 weighted images demonstrating the uterine septum asymmetrically dividing the uterine cavity along with a blind-ending cavity and hematometra.  T1 weighted images show the hematometra, hematosalpinx, and endometrioma.

The treatment is laparoscopy or laparotomy with excision of the septum and unification of the endometrial cavity.  If endometriotic cysts are present, drainage or excision is performed. 

Acknowledgments: Dr Maria Alhasani (radiology resident).