Appendiceal abscess. A challenge in abdominal masses in children

In children, more frequently than in adults, appendicitis is complicated by abscess formation. Facing an abdominal mass, especially if it is in the lower abdomen, the radiologist should consider tumor formation, teratoma, malformation or abscess. If there is air within the mass, the diagnosis of abscess is likely; if there is a stercolith, the diagnosis of perforated appendicitis has to be made.