Spontaneous cutaneous umbilical endometriosis: report of a new case with immunohistochemical study and literature review

Review OA: green CC0 ⤵ 60 in-corpus citations
⚙ AI-generated summary by gemini-2.5-flash-lite, 2026-06-08 ⓘ

This paper reports a case of spontaneous umbilical endometriosis, a rare condition where endometrial tissue grows on the skin, and reviews its clinical and pathological characteristics.

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Abstract

Endometriosis (i.e., the presence of functional endometrial tissue outside the uterine cavity) may rarely affect the skin either spontaneously or secondary to abdomino-pelvic surgery. Spontaneous cutaneous endometriosis appears most commonly on the umbilicus (Villar nodule) and manifests with a red-brown nodule that characteristically shows cyclic variations (tenderness or bleeding) with the menstrual cycle. We present herein a new case of spontaneous cutaneous endometriosis of the umbilicus that was studied immunohistochemically and review the salient clinicopathologic features of this rare condition.

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Condition tags

endometriosis

MeSH descriptors

Endometriosis Skin Diseases Umbilicus Adult Adult Endometriosis Endometriosis Endometriosis Female Female Humans Humans Immunohistochemistry Immunohistochemistry Keratin-7 Keratin-7 Keratin-7 Receptors, Estrogen Receptors, Estrogen Receptors, Estrogen

Citation neighborhood (2-hop)

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. Outer rings show 2-hop neighbours — papers reached through the immediate citers/citees. [ collapse to 1-hop ]

Cited by (50)

Source provenance

europepmc
last seen: 2026-10-12T06:17:10.165071+00:00
openalex
last seen: 2026-06-10T17:14:06.276822+00:00
pubmed
last seen: 2026-10-08T21:09:19.025198+00:00
License: CC0 · commercial use OK