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Background <p>Colonic involvement due to endometriosis is a rare condition with a nonspecific clinical presentation. In rare instances, it may undergo malignant transformation, mimicking primary colorectal carcinoma and complicating clinical decision-making.</p> Case presentation <p>We present two cases illustrating the diverse clinical manifestations of colonic endometriosis. In Case 1, a female patient underwent appendectomy for abdominal pain, but further evaluation revealed full-thickness endometriosis of the sigmoid colon, causing subtotal occlusion. In Case 2, sigmoid endometriosis was discovered during endoscopic evaluation prompted by positive occult fecal blood testing. Histopathological analysis revealed malignant transformation to endometrioid adenocarcinoma. In both cases, definitive treatment was achieved via laparoscopic sigmoid resection, highlighting the role of laparoscopic surgery in managing such conditions.</p> Conclusions <p>The potential for malignant transformation of colonic endometriosis and its tendency to mimic colorectal carcinoma underscore the importance of proper tissue sampling methods and histopathological confirmation. A high index of suspicion and appropriate surgical intervention are key to effective management.</p>

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Colonic endometriosis: from subtotal bowel obstruction to malignant transformation - a case series and literature review

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年6月11日

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  • Roland Fejes,
  • Zsófia Balajthy,
  • Csaba Góg,
  • Ágota Vajda,
  • Fanni Hegedűs,
  • Zsolt Simonka,
  • Szabolcs Ábrahám

摘要

Background

Colonic involvement due to endometriosis is a rare condition with a nonspecific clinical presentation. In rare instances, it may undergo malignant transformation, mimicking primary colorectal carcinoma and complicating clinical decision-making.

Case presentation

We present two cases illustrating the diverse clinical manifestations of colonic endometriosis. In Case 1, a female patient underwent appendectomy for abdominal pain, but further evaluation revealed full-thickness endometriosis of the sigmoid colon, causing subtotal occlusion. In Case 2, sigmoid endometriosis was discovered during endoscopic evaluation prompted by positive occult fecal blood testing. Histopathological analysis revealed malignant transformation to endometrioid adenocarcinoma. In both cases, definitive treatment was achieved via laparoscopic sigmoid resection, highlighting the role of laparoscopic surgery in managing such conditions.

Conclusions

The potential for malignant transformation of colonic endometriosis and its tendency to mimic colorectal carcinoma underscore the importance of proper tissue sampling methods and histopathological confirmation. A high index of suspicion and appropriate surgical intervention are key to effective management.