Giant aneurysms of bilateral internal carotid arteries in a child.

Aneurysms in the petrous or cavernous portion of the internal carotid artery in childhood are extremely rare. Only two such cases have been previously reported. We present a case of bilateral giant intrapetrous aneurysms in a young female. CT was especially helpful in evaluating the absolute size of these aneurysms. This case is unique in that we demonstrated the temporal evolution of internal carotid aneurysms on follow-up angiography.