Fig. 2

Plain CT scan head demonstrate small hyper density in the suprasellar cistern a. Reconstructed image of CT angiogram demonstrates an anteriorly directed A- comm artery aneurysm with bilobed appearance with dominant left A1 and right A1 is not visible b. Intraoperative images after left pterional craniotomy c and d demonstrates ipsilateral RAH (purple arrow) adhered to the neck of aneurysm (red star). After successful separation of the RAH from aneurysm the ipsilateral A2 (yellow arrow) is seen parallel to the opposite side of A2. In this case, RAH is arising from ipsilateral A2