There is a right middle cerebellar peduncle mass lesion with moderate surrounding FLAIR abnormality indicating vasogenic edema and significant T2* shortening on the GRE and EPI images, consistent with hemorrhage, concordant with the CT findings.
This lesion is associated with a relatively large developmental venous anomaly, with "caput medusa" within the right cerebellar hemisphere and superiorly into the pons; exiting from the right cerebellopontine angle and draining into the right superior/inferior petrosal and cavernous sinus confluence.
On the background of hypoplastic left A1 and P1, MRA demonstrates a large right-sided paraclinoid aneurysm, pointing anterolaterally. The aneurysm neck is likely situated over the carotico-ophthalmic segment, with the aneurysm configuration appearing bilobed. The less likely possibility is two aneurysms very closely located.
No convincing further abnormalities identified.
Conclusion:
The findings are most consistent with a hemorrhage into right cerebellar/cerebellar peduncle cavernoma, associated with a relatively large DVA.
Note also made of an incidental right caroticophthalmic aneurysm.