title: Infected retro-umbilical dermoid presenting as an acute emergency.
mesh_terms: D000006:Abdomen, Acute / Q000175:diagnosis*; D000009:Abdominal Muscles; D000328:Adult; D003884:Dermoid Cyst / Q000175:diagnosis; D003937:Diagnosis, Differential; D006801:Humans; D007239:Infections; D008297:Male; D014472:Umbilicus / Q000002:abnormalities; D014496:Urachal Cyst / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery