Intraventricular fetus-in-fetu. Case report.

The authors present a case of an intraventricular 14-cm fetus in a 6-week-old infant who presented with enlarging head size. The entire intracranial fetus, with recognizable limbs, trunk, head, and exomphalos, was removed totally from the lateral and third ventricles, with excellent recovery in the patient, who is now 18 months old. The cytogenetical and tissue histological studies are reported. The embryology, operative procedure, and pathology of this condition are discussed and the literature briefly reviewed.