A 35 years old female patient came with sudden onset of headache, diplopia, nystagmus, right sided weakness and gait disturbances.

MRI showed signal change in pons and left middle cerebellar peduncle and a heterogenous mass inseparable from the basilar artery in the prepontine cistern…hematoma

A DSA was done which revealed a dissecting aneurysm from the mid-basilar artery jutting to the left side.

Embolisation of the aneurysm was done with GDC coils. The basilar artery was also occluded. All the major braches proximal and distal to the arterial occlusion were filling adequately.