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• W2921196829 abstract "Appendiceal mucoceles are rare lesions which most often result from obstruction of the appendiceal cavity and mucinous secretions resulting in cystic dilatation of the appendiceal lumen. They are divided into neoplastic and non-neoplastic subtypes. Non-neoplastic mucoceles may arise secondary to mucosal hyperplasia and retention cysts, while their neoplastic counterparts include mucinous cystadenoma and cystadenocarcinomas. Diagnosis is critical because a neoplastic mucocele has the possibility to rupture and lead to peritoneal dissemination of malignant cells. We present the case of a male patient who was misdiagnosed with appendiceal mucocele and underwent laparoscopic removal of appendiceal mass. A 38-year-old male with a past medical history of hemorrhoids who presented to clinic with complaints of bright red blood per rectum. He noted poor oral intake and weight loss. Physical exam was unremarkable. Blood work revealed severe iron deficiency anemia with hemoglobin 5.7 and hematocrit 21.3. Colonoscopy was scheduled, during which the patient was found to have what appeared to be an appendiceal mucocele at the cecum. A CT of the abdomen and pelvis was unremarkable. The patient subsequently underwent laparoscopic removal of cecal mass and frozen section of cecal tissue revealed benign nodule of large intestine-type mucosa with lymphoid aggregates and germinal centers. The mass was noted likely to be an everted appendix with a benign appendiceal nodule. Postoperative recovery was uneventful. Differential diagnosis of an appendiceal mucocele is broad, including appendicitis, appendiceal neoplasms and mesenteric cysts. The importance of differentiating between these pathologies is because with appendiceal mucoceles, there is concern for possible cystadenocarcinoma and risk for pseudomyxoma peritonei. This risk requires surgical resection to be pursued when appendiceal mucocele is present. These pathologies can be distinguished from an appendiceal mucocele by different methods, including endoscopic ultrasound (EUS). Unfortunately, literature search for endosonographic descriptions of submucosal lesions including glandular nodules have been scarce, and more research must be done in this area. In this patient, differentiating between appendiceal mucocele and benign appendiceal nodule through EUS would help to avoid unnecessary surgical intervention. As such, we recommend employment of EUS when there is concern for appendiceal mucocele during colonoscopy.2586_A Figure 1. Questionable appendiceal mucocele at the cecum2586_B Figure 2. Everted appendix with a benign appendiceal nodule" @default.
• W2921196829 created "2019-03-22" @default.
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• W2921196829 date "2018-10-01" @default.
• W2921196829 modified "2023-09-27" @default.
• W2921196829 title "A Case of Everted Appendix With Benign Appendicial Nodule Masquerading as Appendiceal Mucocele: A Case Report" @default.
• W2921196829 doi "https://doi.org/10.14309/00000434-201810001-02585" @default.
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