Three‐Dimensional Sonography for Diagnosis of Rectovaginal Septum Endometriosis

Maria Angela Pascual, M. Pascual, Stefano Guerriero, S. Guerriero, L. Hereter, Lourdes Hereter, Pere Barri-Soldevila, Pedro Barri-Soldevila, S. Ajossa, Silvia Ajossa, Betlem Graupera, B. Graupera, Ignacio Rodríguez, Ignacio Rodriguez
Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine · 2013 · vol. 32(6) , pp. 931–935 · doi:10.7863/ultra.32.6.931 · PMID:23716513 · W2112533318
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Introital 3D sonography demonstrated very good interobserver agreement for diagnosing deep endometriosis of the rectovaginal septum in 83 patients.

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Abstract

OBJECTIVES: The aim of this study was to evaluate the interobserver agreement for diagnosis of deep endometriosis of the rectovaginal septum using introital 3-dimensional (3D) sonography. METHODS: Two experienced observers (observers A and B) performed a retrospective review of stored 3D sonographic volumes from a sample of 84 consecutive patients with a clinical suspicion of endometriosis. Each observer, independently and blinded to each other, evaluated the presence or absence of involvement of the rectovaginal septum. When no lesion was seen, the observers were asked to judge whether the acquisition of the volume was suboptimal for interpretation or whether no lesion on the rectovaginal septum was detectable. One inadequate acquisition case was discarded; a total of 83 cases were evaluated. To calculate the performance of introital 3D sonography, 7 discordant cases were reviewed by a third observer. Interobserver agreement was assessed by calculating the κ index, and the sensitivity, specificity, positive predictive value, and negative predictive value for the 3 observers were also determined. RESULTS: Interobserver agreement was 0.816 (95% confidence interval, 0.69-0.93), representing very good agreement. Sensitivity was 74.1%; specificity, 85.7%; positive predictive value, 71.4%; and negative predictive value, 87.3%. CONCLUSIONS: Our results show that introital 3D sonography for diagnosis of deep endometriosis of the rectovaginal septum is reproducible, with very good interobserver agreement.

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Condition tags

endometriosis

MeSH descriptors

Endometriosis Endometriosis Rectum Vagina Adult Endometriosis Female Humans Imaging, Three-Dimensional Observer Variation Prevalence Rectum Reproducibility of Results Risk Factors Sensitivity and Specificity Spain Spain Ultrasonography Vagina Young Adult

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