Aim: We present an illustrative autopsy case of thrombosed giant bilateral vertebral artery aneurysms. Introduction: A 61-year-old male died at Department of Infective disease with a clinical diagnosis for bilateral bronchopneumonia, cerebral aneurism, fibro muscular dysplasia, CVI, HTA, chronic CMP, cardiac arrest. Material and Methods: Standard autopsy technic with neuropathology brain dissection and standard procedure of paraffin embedded section routinely stained with HE was performed. Results: Gross examination of the brain at the autopsy showed saccular giant bilateral vertebral artery aneurysms that measured 58 mm on the right and 40 mm on the left artery. They were tumor-like and compressed the medulla and pons. Both were thrombosed. The right was ruptured with subacute subarachnoid bleeding. Sections of the cerebral vessels exhibited minimal atherosclerotic plaques, with mild stenosis (focally up to 10%) of the left internal carotid artery. We found mild dilatation on ventricles and minimal cortical atrophy of the brain. During the microscopic examination angiodysplasia with abnormally dilated blood vessels on visceral organs, predominantly on brain and heart was detected. The cause of death was central type of cardiopulmonary insufficiency with pulmonary edema. Conclusion: We presented an extremely rare case with bilateral giant vertebral aneurysms. Giant cerebral aneurysms are ones that measure >25 mm in greatest dimension and account for ~5% of all intracranial aneurysms. They occur in the 5th-7th decades and are more common in females. Vertebral artery aneurysms constitute 0.5 to 3% of intracranial aneurysms and 20% of posterior circulation aneurysms.

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