{"paper_id":"fba00e34-f1d0-408a-90ca-08b14340bd3b","body_text":"Abstract\nAcute appendicitis is a common surgical emergency, however endometriosis in an appendix is a rare phenomenon. In this case report, we describe a 34-year-old woman who visited a teaching hospital on 2024, presenting with typical clinical features of appendicitis. Initial imaging revealed complicated appendicitis with perforation and an appendicolith; following conservative management, the patient was scheduled for an interval appendectomy which revealed an appendicular mass. A repeat surgery was scheduled, where extensive adhesions were noted, resulting in an open appendectomy. Histopathological examination confirmed appendiceal Endometriosis and a follow-up by a gynaecologist was arranged. Appendiceal Endometriosis is a rare phenomenon with variable clinical presentations, a high index of suspicion is necessary for women of childbearing age due to the risk of complications. The diagnosis of appendiceal Endometriosis is only confirmed via histopathology, and obtaining a Magnetic Resonance Imaging might aid in diagnosis; however, prompt surgical intervention is the standard of care.\nArticle Type\nCase Report\nPublication Date\n9-17-2025\nFirst Page\n859\nLast Page\n863\nCreative Commons License\nThis work is licensed under a Creative Commons Attribution-No Derivative Works 4.0 International License.\nRecommended Citation\nBalushi, Rawan Al; Hinai, Maiyan Al; Maawali, Shihab Al; Qari, Abdullah Al; and Khaboori, Sadiq Al\n(2025)\n\"Appendicitis with Appendicular Phlegmon Secondary to Endometriosis,\"\nSultan Qaboos University Medical Journal: Vol. 25: 859-863.\nDOI: https://doi.org/10.18295/2075-0528.2911","source_license":"CC0","license_restricted":false}