Endometriosis is characterized by the presence of endometrial tissue outside the
uterus. When endometrial implants penetrate more than 5 mm into the peritoneum,
the condition is referred to as deep pelvic endometriosis. Although laparoscopy
is the gold standard test to establish a diagnosis of deep endometriosis,
transvaginal ultrasound represents an alternative that can contribute to
detection of the disease, because it is an accessible, low-cost, noninvasive
examination that allows preoperative planning in cases requiring surgical
treatment. However, in clinical practice, transvaginal ultrasound is still not
widely used as the first-line examination in suspected cases of endometriosis.
This essay describes the findings of deep endometriosis on transvaginal
ultrasound, in order to disseminate knowledge of the utility of the technique
for the diagnosis of this disease.