OP16.03: Extended transvaginal ultrasound in deep endometriosis: use of bowel preparation and acoustic window with intravaginal gel

To assess the diagnostic performance of extended transvaginal ultrasound (EXTU) for diagnosing deep infiltrating endometriosis (DIE). prospective study comprising 51 women with suspected DIE. All women underwent EXTU, that includes the assessment of three pelvic compartments by transvaginal ultrasound (anterior compartment: bladder and distal ureters; mid compartment: uterus and ovaries; and posterior compartment: posterior vaginal fornix, retrocervical area, pouch of Douglas and rectosigmoid). The sliding sing for detecting Douglas' pouch obliteration was also assessed. All patients received bowel preparation prior to ultrasound examination. All women underwent laparoscopic surgery and histologic confirmation of endometriosis was done. giving a total of 55 DIE lesions histologically confirmed (rectosigmoid, n = 13; vagina, n = 5; retrocervical, n = 32, bladder, n = 5). Sensitivity, specificity and LR + for rectosigmoid involvement were 100%, 93% and 14.0, respectively. Sensitivity, specificity, LR + and LR- for vaginal involvement were 60%, 98%, 30.0 and 0.41, respectively. Sensitivity, specificity, LR + and LR- for retrocervical involvement were 84%, 96%, 19.4 and 0.16, respectively. Sensitivity, specificity and LR- for bladder involvement were 20%, 100%, and 0.80, respectively. Sensitivity, specificity, LR + and LR- of sliding sign for diagnosing obliteration of Douglas were 89%, 92%, 10.7 and 0.12, respectively. Supporting information can be found in the online version of this abstract Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.