Pictorial quiz: A 2-year-old boy with abdominal pain

Abstract

A 2-year-old boy presented with abdominal pain and non-coffee-ground emesis for 1 day. He was afebrile and without decreased activity. Examination showed lower abdominal tenderness, but psoas and obturator signs were negative. Laboratory test showed mildly elevated C-reactive protein (1.321 mg/dL) without leukocytosis. An abdominal X-ray revealed a high-attenuation-calcified lesion near the right sacroiliac joint which was highly suspected as an appendicolith. Subsequent abdominal computed tomography proved an appendicitis with appendicolith inside. He underwent laparoscopic appendectomy and was discharged uneventfully 4 days later. Acute appendicitis is a commonly misdiagnosed pediatric emergency because of the atypical presentations. Appendicoliths are presented in more than half of pediatric appendicitis and are highly associated with perforation. Surgery is recommended instead of antibiotics therapy alone to manage appendicolith-related appendicitis. A careful interpretation of the plain abdominal films and keeping a high suspicion are vital to early diagnosis of this disease.