PRIMARY MEGAURETER MIMICKING HYDROSALPINX ON ULTRASONOGRAPHY

Tubular adnexal masses are common findings during pelvic sonography an d engender a reasonably short and straightforward list of differential diagnoses. Prominent in this list is hydrosalpinx, the dilated fallop ian tube that typically appears as a fluid-filled tubular structure, o ften with folds or turns.(1-3) Although the possible confusion between a hydrosalpinx and other adnexal entities, such as dilated pelvic vei ns, fluid-filled loops of bowel, and ovarian cysts, is well described, (1,2,4,5) the additional possibility of a dilated ureter has not, to o ur knowledge, been similarly emphasized. We describe the clinical and ultrasonographic findings in a patient with a primary megaureter that mimicked a hydrosalpinx on ultrasonography, and we discuss ultrasonogr aphic features that may serve to distinguish the two conditions.