A foetus in the abdomen of a boy.
D000005:Abdomen / Q000601:surgery; D000008:Abdominal Neoplasms / Q000175:diagnosis; D003937:Diagnosis, Differential; D005333:Fetus; D006801:Humans; D007223:Infant; D008297:Male; D012737:Sex Factors; D013724:Teratoma / Q000175:diagnosis; D014428:Twins, Conjoined / Q000175:diagnosis