Endoanal ultrasonography in the diagnosis and operative management of perianal endometriosis: report of two cases

Toyonaga T, T. Toyonaga, Matsushima M, M Matsushima, Makoto Matsushima, Tanaka Y, Y Tanaka, Yoshiaki Tanaka, M Nozawa, Mina Nozawa, Nozawa M, Nobuhito Sogawa, N Sogawa, Sogawa N, Hiroki Kanyama, Kanyama H, H Kanyama, Tanaka M, M Tanaka, Masao Tanaka
Techniques in coloproctology · 2006 · vol. 10(4) , pp. 357–360 · doi:10.1007/s10151-006-0309-7 · PMID:17115307 · W2015138488
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⚙ AI-generated summary by claude@2026-06+body, 2026-06-24 ⓘ

Endoanal ultrasonography assisted in the diagnosis and operative management of perianal endometriosis in two cases, accurately characterizing lesions and guiding surgical decisions regarding sphincter involvement.

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⚙ AI-generated deep summary by claude@2026-06, 2026-06-24 · read from full text ⓘ

This paper reports two cases of perianal endometriosis assessed with endoanal ultrasonography to guide operative management. The first patient had perianal pain, with ultrasonography showing a hypoechoic anterior perianal mass without anal sphincter involvement, and she underwent local excision without damage to the sphincter. The second patient’s perianal pain coincided with menstruation, and ultrasonography showed a heterogeneous mass with cystic anechoic areas in the right anterior perianal region involving the external anal sphincter; she received wide excision including part of the external anal sphincter and primary sphincteroplasty. The paper’s limitation is that the evidence is based on only two case reports, and the authors do not provide broader diagnostic performance estimates. This paper is centrally about endometriosis—specifically using endoanal ultrasonography to diagnose and plan surgery for perianal endometriosis and to assess anal sphincter involvement.

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Abstract

We report two cases of perianal endometriosis in which we were greatly assisted by endoanal ultrasonography. Patient 1 was a 43-year-old woman with perianal pain. Endosonography showed a hypoechoic mass in the anterior perianal region without involvement of the anal sphincter. Local excision was performed under spinal anesthesia without damage to the anal sphincter. Patient 2 was a 30-year-old woman with perianal pain coinciding with her menstrual period. Endosonography showed a heterogeneous mass containing cystic anechoic areas in the right anterior perianal region and involving the external anal sphincter. Wide excision, including the episiotomy scar and part of the external anal sphincter, and primary sphincteroplasty were performed under spinal anesthesia. According to our experience, preoperative endosonography is a reliable technique for visualizing perianal endometriosis and for diagnosing anal sphincter involvement. Operative management should be determined on the basis of preoperative and intraoperative ultrasonographic assessment.
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Abstract We report two cases of perianal endometriosis in which we were greatly assisted by endoanal ultrasonography. Patient 1 was a 43-year-old woman with perianal pain. Endosonography showed a hypoechoic mass in the anterior perianal region without involvement of the anal sphincter. Local excision was performed under spinal anesthesia without damage to the anal sphincter. Patient 2 was a 30-yearold woman with perianal pain coinciding with her menstrual period. Endosonography showed a heterogeneous mass containing cystic anechoic areas in the right anterior perianal region and involving the external anal sphincter. Wide excision, including the episiotomy scar and part of the external anal sphincter, and primary sphincteroplasty were performed under spinal anesthesia. According to our experience, preoperative endosonography is a reliable technique for visualizing perianal endometriosis and for diagnosing anal sphincter involvement. Operative management should be determined on the basis of preoperative and intraoperative ultrasonographic assessment. Similar content being viewed by others Author information Authors and Affiliations Corresponding author Rights and permissions About this article Cite this article Toyonaga, T., Matsushima, M., Tanaka, Y. et al. Endoanal ultrasonography in the diagnosis and operative management of perianal endometriosis: report of two cases. Tech Coloproctol 10, 357–360 (2006). https://doi.org/10.1007/s10151-006-0309-7 Received: Accepted: Published: Issue date: DOI: https://doi.org/10.1007/s10151-006-0309-7

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Condition tags

endometriosis

MeSH descriptors

Anus Diseases Endometriosis Endosonography Adult Anus Diseases Anus Diseases Endometriosis Endometriosis Female Humans

Citation neighborhood

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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