Anal Endosonography in the Diagnosis and Management of Perianal Endometriosis: Report of a Case

Watanabe M, Goichi Kamiyama, Kamiyama G, Katsuo Yamazaki, Yamazaki K, Kenshi Hiratsuka, Manabu Takata, Hiratsuka K, Akira Tsunoda, Takata M, Tsunoda A, Miki SHIBUSAWA, Mitsuo Kusano, Shibusawa M, Kusano M, Makoto Watanabe
Surgery today · 2003 · vol. 33(8) , pp. 630–632 · doi:10.1007/s00595-003-2545-z · PMID:12884104 · W2082370556
article OA: closed CC0 ⤵ 18 in-corpus citations
Full text JSON View on OpenAlex View on PubMed View at publisher
⚙ AI-generated summary by gemini-2.5-flash-lite+body, 2026-06-12 ⓘ

Anal endosonography diagnosed perianal endometriosis in a woman with a perineal mass, revealing a well-defined lesion near the external anal sphincter that guided successful surgical enucleation.

One-sentence paraphrase of the abstract; not a substitute for reading it. No clinical advice. How this works

⚙ AI-generated deep summary by claude@2026-06, 2026-06-12 · read from full text ⓘ

This paper reports a rare case of perianal endometriosis in a 39-year-old woman with several days of a painful perineal mass and perianal redness/swelling. Using anal endosonography directed to the right anterior area, the authors identified a sharply defined 17 × 14 mm lesion with high echoic enhancement at its center, located along the edge of the external anal sphincter without sphincter involvement, which supported ruling out abscess or fistula. Based on the imaging-defined anatomy, they judged enucleation under local anesthesia would not injure the anal sphincter, and surgery proceeded uneventfully with histology confirming endometriosis. The paper does not explicitly state limitations, but it is a single-case report. This paper is centrally about endometriosis — it describes the diagnostic and operative role of anal endosonography in a case of perianal endometriosis.

Read from the paper's body, not the abstract. Not a substitute for reading the paper. No clinical advice. How this works

Abstract

We report a rare case of perianal endometriosis, diagnosed in a 39-year-old woman who presented with a several-day history of a painful mass in the perineum. Perianal examination showed redness and swelling in the right anterior direction. A soft tumor was palpated, but there was no evidence of an episiotomy scar, or of fistula orifices. An anal endosonography in the right anterior direction revealed a sharply defined lesion, 17 x 14 mm in diameter, with high echoic enhancement at its center. The lesion was located along the edge of the external anal sphincter but did not involve it. Based on these endosonographic findings, the tumor was not considered to be an abscess or fistula. We detected its location, and judged it possible to enucleate the tumor under local anesthesia without injuring the anal sphincter. The operation was performed uneventfully and a histological diagnosis of endometriosis was confirmed. Using anal endosonography, we were able to determine the exact anatomic relationship of the lesion in the internal and external sphincter, which substantially influenced the diagnosis and operative procedures.
Full text 1,770 characters · extracted from oa-doi-fallback · click to expand
Abstract We report a rare case of perianal endometriosis, diagnosed in a 39-year-old woman who presented with a several-day history of a painful mass in the perineum. Perianal examination showed redness and swelling in the right anterior direction. A soft tumor was palpated, but there was no evidence of an episiotomy scar, or of fistula orifices. An anal endosonography in the right anterior direction revealed a sharply defined lesion, 17 × 14 mm in diameter, with high echoic enhancement at its center. The lesion was located along the edge of the external anal sphincter but did not involve it. Based on these endosonographic findings, the tumor was not considered to be an abscess or fistula. We detected its location, and judged it possible to enucleate the tumor under local anesthesia without injuring the anal sphincter. The operation was performed uneventfully and a histological diagnosis of endometriosis was confirmed. Using anal endosonography, we were able to determine the exact anatomic relationship of the lesion in the internal and external sphincter, which substantially influenced the diagnosis and operative procedures. Access this article We’re sorry, something doesn't seem to be working properly. Please try refreshing the page. If that doesn't work, please contact support so we can address the problem. Similar content being viewed by others Author information Authors and Affiliations Rights and permissions About this article Cite this article Watanabe, M., Kamiyama, G., Yamazaki, K. et al. Anal Endosonography in the Diagnosis and Management of Perianal Endometriosis: Report of a Case. Surg Today 33, 630–632 (2003). https://doi.org/10.1007/s00595-003-2545-z Received: Accepted: Issue date: DOI: https://doi.org/10.1007/s00595-003-2545-z

Text is read by the "Ask this paper" AI Q&A widget below. Extraction quality varies by source — PMC NXML preserves structure cleanly, OA-HTML may include some navigation residue, and OA-PDF can have broken hyphenation. The publisher copy (via DOI) is the canonical version.

My notes (saved in your browser only)

⚙ Ask this paper AI returns verbatim quotes from the full text · source: oa-doi-fallback ⓘ

Answers must be backed by verbatim quotes from this paper's full text. Hallucinated quotes are dropped automatically; if no verbatim passage answers the question, we say so. How this works

Condition tags

endometriosis

MeSH descriptors

Anus Diseases Endometriosis Endosonography Adult Anal Canal Anal Canal Anesthesia, Local 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.

References (6)

Cited by (18)

Source provenance

europepmc
last seen: 2026-09-19T06:15:14.566301+00:00
openalex
last seen: 2026-06-10T17:14:06.276822+00:00
pubmed
last seen: 2026-05-13T22:12:50.257867+00:00
unpaywall
last seen: 2026-09-19T06:31:22.526400+00:00
License: CC0 · commercial use OK