title: Paediatric urinary bladder 'tumour' due to perforated appendicitis.
mesh_terms: D000208:Acute Disease; D001064:Appendicitis / Q000150:complications / Q000175:diagnosis*; D002648:Child; D006417:Hematuria / Q000209:etiology; D006801:Humans; D008297:Male; D001745:Urinary Bladder Diseases / Q000175:diagnosis* / Q000209:etiology