Incidental Identification of an Intracranial Vertebral Artery Aneurysm Related to Unilateral Vertebral Artery Occlusion in a Patient With a Ruptured Internal Carotid-Posterior Communicating Artery Aneurysm: A Case Report. - Nakajima K; Kobayashi T; Kawasaki T; Ioroi Y; Maki Y; Takayama M (Cureus, 2026)