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Nongynecologic Applications of Transvaginal US¹

¹ From the Department of Medical Imaging, The Toronto Hospital, University of Toronto, 200 Elizabeth St, Toronto, Ontario M5G 2C4, Canada. Received January 7, 1999; revision requested February 15 and received March 21; accepted March 26. Address reprint requests to S.R.W.

Transvaginal ultrasonography (US) is a noninvasive, readily available imaging technique that has greatly enhanced diagnostic sensitivity and accuracy for both gynecologic and nongynecologic disease. High-frequency US probes placed in the vagina allow high-resolution assessment of all the pelvic viscera, including portions of the gut and urinary tract. In addition, they allow visualization of the peritoneum of the pelvic pouch and the pelvic side walls without interference from bowel gas or adipose tissue. Evaluation of these areas requires a modified US technique that includes the use of the highest-frequency probes with angulation of the transducer to allow assessment of the region of interest. In women of childbearing age, the similarity of symptoms in gynecologic and gastrointestinal tract disease in particular underscores the potential utility of transvaginal US, which may, for example, help differentiate appendicitis in a pelvic appendix from pelvic inflammatory disease. Transvaginal US may also help determine the correct course of therapy, thereby improving patient management. Other indications for transvaginal US include assessment for pelvic appendicitis and diverticulitis, rectal and perianal complications of Crohn disease, and ureteric and bladder calculi and tumors as well as evaluation of the anal sphincters in women with fecal incontinence. Transvaginal US is also superior to routine US in the detection and characterization of ascites and peritoneal disease. Transvaginal US examination should include the entire pelvic cavity and contents, especially in women at risk for pelvic sepsis or peritoneal disease.

Index Terms: Bladder, diseases, 83.214, 83.3192 • Bladder neoplasms, 83.321, 83.328 • Gastrointestinal tract, diseases, 70.262, 75.273, 751.291, 757.40, 791.3196 • Gastrointestinal tract, neoplasms, 70.30 • Pelvic organs, diseases, 85.20, 85.30 • Pelvic organs, US, 85.12989 • Peritoneum, abnormalities, 791.3196 • Peritoneum, fluid, 791.77 • Ultrasound (US), utilization, **.12989³ • Ureter, calculi, 82.811