Low-grade Appendiceal Mucinous Neoplasm and Endometriosis: Incidental Coincident Pathologies at Cesarean Section

Nathaniel Yohannes, Jaclyn C. Watkins, Jaclyn C Watkins, Amy G Weeks, Sarah S Osmundson, Chanjuan Shi, Alexandra E Kovach
International journal of gynecological pathology : official journal of the International Society of Gynecological Pathologists · 2019 · vol. 39(5) , pp. 498–502 · doi:10.1097/pgp.0000000000000630 · PMID:31433375 · W2969701719
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Abstract

Incidental pathologic findings at the time of Cesarean section are exceedingly uncommon. Similarly, occult low-grade appendiceal mucinous neoplasms and other noninflammatory, non-neoplastic appendiceal pathologies are rare, although appendiceal neoplasia, most commonly well-differentiated neuroendocrine tumors, may be found during evaluation of acute appendicitis. Here we report the first case of incidental coincident low-grade appendiceal mucinous tumor and endometriosis involving the appendix at the time of Cesarean section. We highlight pitfalls in the histopathologic evaluation of these processes, particularly given the setting of decidualization of ectopic endometrial stroma, as well as the prognostic implications of low-grade appendiceal mucinous tumors to emphasize the importance of clinicopathologic correlation and careful intraoperative examination of the appendix and other visible structures during Cesarean section.

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Condition tags

mesh:D004715endometriosis

MeSH descriptors

Adenocarcinoma, Mucinous Appendiceal Neoplasms Endometriosis Adenocarcinoma, Mucinous Adenocarcinoma, Mucinous Adult Appendiceal Neoplasms Appendiceal Neoplasms Appendix Appendix Cesarean Section Endometriosis Endometriosis Female Humans Prognosis

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