A case of congenital unilateral partial absence of fallopian tube.

Congenital partial absence of a fallopian tube has rarely been reported in the literature. A 29-year-old nulligravida woman presented with a two-year history of infertility. Hysterosalpingography revealed an obstructed left fallopian tube with a normal uterine cavity and right fallopian tube. After several AIH treatments, diagnostic laparoscopy was performed, revealing segmental absence of the mid portion of the left fallopian tube. Only a 1-cm stump of the left fallopian tube remained, the majority of the isthmic portion was absent. A 3-cm distal ampullary portion with normal-appearing fimbria was attached to the left pelvic sidewall near the pelvic brim. No other abnormal findings were observed for the uterus, right fallopian tube, and ligaments surrounding the uterus. There are two possible etiologies of partial absence of the fallopian tube:congenital absence associated with developmental alterations of the Müllerian ducts or asymptomatic torsion followed by autoamputation and reabsorption.