Fetus in fetu.
D000008:Abdominal Neoplasms / Q000175:diagnosis; D009008:Abnormalities, Severe Teratoid; D003937:Diagnosis, Differential; D005260:Female; D005333:Fetus / Q000601:surgery; D006801:Humans; D007082:Ileum / Q000601:surgery; D007223:Infant; D008297:Male; D011247:Pregnancy; D013724:Teratoma / Q000175:diagnosis; D014427:Twins