The<unk>  is a form of a uterine anomaly or variation where the uterine cavity displays a concave contour towards the fundus. Normally the uterine cavity is straight or convex towards the fundus on anterior-posterior imaging, but in the<unk>  the myometrium of the fundus dips into the cavity and may form a small septation. The distinction between an<unk>  and a septate uterus is not standardized.
Arcuate uterus
Retroverted uterus
Couvelaire uterus
Bicornuate uterus
T-shaped uterus
Unicornuate uterus
Imperforate hymen
Uterine septum