Adnexal and cul-de-sac abnormalities: transvaginal sonography.

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Abstract
Sixty-seven patients selectively chosen from 354 undergoing conventional transabdominal (TA) sonography for evaluation of a clinically suspected adnexal mass subsequently underwent transvaginal (TV) sonography either because the TA sonograms were technically suboptimal or because it was not possible to characterize with certainty an abnormality identified with TA sonography. TV sonography added diagnostically useful information in 25 of 28 patients with cystic pathologic changes in the adnexa uteri. Eight of 12 patients with tuboovarian abscess and nonspecific adnexal masses visualized with TA sonography had tube-shaped fluid collections characteristic of pyosalpinx identified with TV sonography. TV sonography added diagnostically useful information in all seven patients with diseases of the cul-de-sac (rectouterine fossa) and allowed differentiation of adnexal from primary uterine disease in three patients with TA sonograms on which findings were equivocal. It also expedited the diagnosis of a tubal pregnancy in ten of 14 patients and was useful in the detection of adhesions and perforated intrauterine devices. These results indicate that adjunctive TV sonography can provide important diagnostic information.