Surgery in postmenopausal women--the value of transvaginal sonography. 
Transvaginal sonography is a recent addition to the diagnostic techniques available for the evaluation of the female pelvis.  Transvaginal sonography is performed with a high-frequency transducer placed in the vagina where it is in close anatomic proximity to the pelvic structures.  The procedure overcomes difficulties in imaging obese patients, those with a large amount of bowel gas, and those with inadequate bladder filling.  Our experience in over 200 cases of postmenopausal women is the subject of this review.  This technique has been employed to detect ovarian and adnexal abnormalities, endometrial changes (hyperplasia and endometrial carcinoma), myometrial invasion, fibroids, adnexal torsion and free fluid in the rectouterine fossa.  The results suggest that transvaginal sonography has considerable advantages in the evaluation of pelvic structures in postmenopausal women prior to planned surgical exploration.