Unveiling Atypical and Uncommon Appendiceal Pathologies in Pediatric Patients With Appendicitis.

Acute appendicitis typically presents with classic symptoms; atypical manifestations lacking distinct features are common. Failure to recognize vague presentations delays diagnosis and increases complications. We present a pediatric case series of three male patients aged seven, 12, and 15 years with confirmed appendicitis but unusual additional pathological findings only discovered after appendectomy. The seven-year-old patient exhibited severe diffuse tenderness with evidence of perforation, abscess, and marked inflammation; resection revealed multiple obstructing appendiceal lipomas underlying this complicated disease course. The 12-year-old patient had subtle symptoms, but operative findings showed significant localized inflammation; pathology identified predisposing appendiceal diverticulae. Finally, the 15-year-old patient had inflammation with Actinomyces colonization, representing an incidental discovery unrelated to infection in the setting of appendicitis. These cases illustrate that unusual pathological findings can sometimes underly or be incidentally associated with typical appendiceal inflammation. Thorough pathologic assessment facilitates clinical management when atypical features manifest with appendicitis. Improved provider recognition of the heterogeneity of appendicitis presentations enables timely diagnosis even absent classic features.