Endometriosis of sigmoid colon mimicking malignant tumor diagnosed by intraoperative imprint cytology

Hiroyuki Ohsaki, Muneo Nakamura, Keiji Arie, Eiichiro Hirakawa, Reiji Haba, Yoshiaki Norimatsu
Diagnostic cytopathology · 2011 · vol. 40(2) , pp. 159–162 · doi:10.1002/dc.21608 · PMID:22246934 · W2022388150
article OA: closed CC0 ⤵ 1 in-corpus citation
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⚙ AI-generated summary by claude@2026-06, 2026-06-08 ⓘ

This paper reports a case where intraoperative imprint cytology of the sigmoid colon, showing epithelial and stromal components with specific nuclear features, aided in diagnosing endometriosis mimicking a malignant tumor.

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Abstract

A case of endometriosis of the sigmoid colon on imprint cytology from an intraoperative biopsy is discussed. Cytologic specimens showed sheets or tubular epithelial clusters and stromal fragments. The epithelial cell nuclei were small and round to ovoid with finely granular chromatin and inconspicuous nucleoli. The background showed a few scattered spindle-type stromal cells without pigment-laden histiocytes. A definitive diagnosis of endometriosis can be based on cytology, provided that the cytologic findings are interpreted in the appropriate clinical context.

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Condition tags

endometriosis

MeSH descriptors

Colonic Neoplasms Colon, Sigmoid Endometriosis Epithelial Cells Azure Stains Biopsy Colonic Neoplasms Colon, Sigmoid Colon, Sigmoid Coloring Agents Diagnosis, Differential Endometriosis Endometriosis Endometriosis Epithelial Cells Female Humans Methylene Blue Middle Aged Xanthenes

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 (16)

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