Adenocarcinoma Ex–Goblet Cell Carcinoid of the Appendix With Metastatic Peritoneal Spread to Meckel’s Diverticulum and Endometriosis

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AI-generated summary by claude@2026-06, 2026-06-07

This case report details an appendiceal adenocarcinoma ex-goblet cell carcinoid with metastatic peritoneal spread to a Meckel's diverticulum and pelvic endometriosis, a rare presentation of this appendiceal malignancy.

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Abstract

Adenocarcinoma ex-goblet cell carcinoid is a very rare and histologically unique appendiceal malignancy with dual glandular and neuroendocrine differentiation. There is a high incidence of this tumor among middle-aged women with metastasis to the gynecologic tract with the mode of metastasis following peritoneal spread rather than hematogenous distribution. Adenocarcinoma ex-goblet cell carcinoid can spread to any peritoneal site including ovaries or omentum. We report a 37-year-old healthy woman who initially presented with right lower quadrant abdominal pain and pseudomyxoma peritonei. Histopathology of the appendectomy specimen revealed an adenocarcinoma ex-goblet cell carcinoid, signet ring cell type. Follow-up right hemicolectomy, omentectomy, bilateral salpingo-oophorectomy, and regional peritoneal resections revealed metastatic involvement by adenocarcinoma ex-goblet cell carcinoid, signet ring cell type. In this report, we describe a case of appendiceal adenocarcinoma ex goblet cell carcinoid with metastases to Meckel's diverticulum and areas of pelvic endometriosis, which have not been previously reported.

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Condition tags

endometriosis

MeSH descriptors

Adenocarcinoma Appendiceal Neoplasms Carcinoid Tumor Endometriosis Ileal Neoplasms Peritoneal Neoplasms Pseudomyxoma Peritonei Adenocarcinoma Adenocarcinoma Adult Appendectomy Appendiceal Neoplasms Appendiceal Neoplasms Appendix Appendix Biopsy Carcinoid Tumor Colectomy Endometriosis Endometriosis

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europepmc
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