Fetus in fetu.
D000008:Abdominal Neoplasms / Q000473:pathology; D003937:Diagnosis, Differential; D005333:Fetus / Q000473:pathology*; D006801:Humans; D007223:Infant; D008297:Male; D013724:Teratoma / Q000473:pathology; D009396:Wilms Tumor / Q000175:diagnosis