Teratoma over scalp with extension to extradural region through deficient temporal bone

Extracranial teratoma over scalp is a rare lesion. A five day old female neonate presented with a huge mass over left parieto-temporal region of scalp. Investigations revealed no associated anomaly. At exploration deficient skull table in the temporal region, at the base of the lesion was found. The tumour was found adherent to dura mater and was separated by sharp dissection. Cut section revealed a large fluid-containing cyst with bowel loops. Biopsy showed mature teratoma