Giant aneurysm of internal carotid artery in a four-year-old child: a case report.

A case of giant saccular aneurysm in early childhood is reported. An internal carotid aneurysm presenting with episodic headache was successfully clipped with complete relief of symptoms. The patient was also investigated for a possible collagen deficiency which proved negative. Clinical features and pathogenesis of this rare lesion are discussed.