The uterus: A new look with transvaginal sonography

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Abstract
Targeted scanning of the uterus and its adjacent structures is made possible by high-resolution transvaginal sonography. A systematic approach is applied so that the normal anatomy and abnormal processes in the various uterine components can be visualized. By adopting this method we detected various pathologies in the cervix, endometrium, myometrium, and in the uterine vessels and ligaments. Cervical pathology included inflammatory processes, cysts, malignant lesions, and incompetence during pregnancy. By scanning the endometrium, a reflection of the hormonal status of the patient under both normal (e.g., the menstrual cycle) and abnormal conditions may be obtained. More sinister lesions, such as endometrial hyperplasia and carcinoma, can be suspected based on the sonographic appearance of the endometrium. In hydatiform mole, a typical bnographic picture directs the sonographer to the diagnosis. Uterine fibroids are the most common lesion of the corpus uteri, and are readily detected by transvaginal sonography, including any degenerative changes that may complicate this condition. Changes in uterine size, particularly when accompanied by profuse intracavitary fluid, should raise the suspicion of a malignant process. Intracavitary fluid may also be associated with inflammatory lesions (e.g., tuberculosis). Congenital uterine anomalies may be diagnosed and defined by this method. Uterine ligaments are best visualized in the presence of fluid in the pelvis. Intraligamentary masses can be also be detected and defined. Finally, the main vessels supplying the uterus can be visualized, both in pregnant and nonpregnant patients. Using a transvaginal image-directed Doppler system, flow velocity profiles can be obtained from these vessels and form the basis for defining abnormalities in uterine perfusion.

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