BACKGROUND:

Teratoma is an almost always benign tumor, with a wide variability in its location; its location in the round ligament is extremely rare.

CLINICAL CASE:

30-year-old patient, with a history of a full-term pregnancy. On routine ultrasound examination, a 46 x 35 mm left paraovarian cystic lesion was reported, with no solid, fatty component or calcifications. In the gynecological examination a mass was palpated above the uterus, oriented to the left side, non-painful. The rest of the physical examination passed without other alterations. The initial diagnostic impression was of abdomino-pelvic teratoma supported by transvaginal ultrasound in which the ovaries were normal, with a mass of mixed echogenicity of 50 x 40 x 46 mm, with echolucent and echogenic areas of variable intensity towards the left superior iliac fossa, without contact with the ovary. The round ligament was sectioned on both sides of the mass and removed without complications; the histopathologic report was: mature cystic teratoma.

CONCLUSIONS:

The round ligament is an infrequent location of dermoid cysts that should be considered in the differential diagnoses of pelvic masses; it is amenable to surgical treatment laparoscopically.

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