Evaluation and comparison of the accuracy of transvaginal ultrasound and MRI for the diagnosis of deep rectal endometriosis: A cross‐sectional study

Saeed Alborzi, Tahereh Poordast, Elham Askary, Masoomeh Javedanmehr, Mahboobeh Hamedi Shahraki, Soroosh Alborzi, Alimohammad Keshtvarz Hesam Abadi
International Journal of Gynecology & Obstetrics · 2022 · vol. 161(2) , pp. 586–593 · doi:10.1002/ijgo.14554 · PMID:36333881 · W4308255588
article OA: closed CC0 ⤵ 8 in-corpus citations
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⚙ AI-generated summary by claude@2026-06, 2026-06-12 ⓘ

Transvaginal ultrasound demonstrated higher accuracy than MRI for superficial rectal endometriosis, with both modalities showing similar performance for deep lesions.

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Abstract

OBJECTIVE: To determine and compare the value of magnetic resonance imaging (MRI) and transvaginal sonography (TVS) in the diagnosis of rectal endometriosis. METHODS: In this cross-sectional study, 555 patients with rectal endometriosis, who had undergone MRI and TVS before laparoscopic operation, were included. The sensitivity, specificity, and accuracy of these two imaging modalities were evaluated and compared based on histopathologic reports and three different kinds of rectal endometriosis surgeries (shaving as a first group and disk and segmental resection methods combined as a second group). RESULTS: Sensitivity, specificity, accuracy, positive predictive value, negative predictive value, positive likelihood ratio, and negative likelihood ratio of ultrasound in the diagnosis of rectal endometriosis were, respectively, 69.55% (65.4%-73.4%), 91.30% (72%-98.9%), 70.4% (66.4%-74.17%), 11.48% (9.77%-13.43%), 99.46% (98%-99.86%), 8.0 (2.12-30.1), and 0.3 (0.28-0.4). These values were 51.37% (47.1%-55.6%), 79.17% (57.8%-92.9%), 52.53% (48.3%-56.6%), 6.64% (5.39%-8.16%), 98.26% (96.26%-99.2%), 2.47 (1.13-5.4), and 0.6 (0.49-077) for MRI. Even though ultrasound had better accuracy for detection of superficial rectal endometriosis (Group 1) (P < 0.001), the sensitivity, specificity, and accuracy of both imaging modalities in diagnosis of deep rectal lesions (Group 2) were almost identical. CONCLUSION: TVS should be considered as a first-line modality for diagnosis of rectal endometriosis, mainly because of its greater availability, lower cost, and higher accuracy.

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Condition tags

endometriosis

MeSH descriptors

Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Endometriosis Rectal Diseases Rectal Diseases

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Papers in the corpus that this work cites (lower rings, blue) and that cite this one (upper rings, green). Dot size scales with the paper's in-corpus citation count — bigger dot = more influential within the endo/adeno field. Click a dot to open that paper. [ expand to 2 hops ] — adds papers reached through this work's immediate citers/citees. Heavier; up to 60 extra dots.

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