Cranial magnetic resonance imaging in spontaneous intracranial hypotension after epidural blood patch.

Spontaneous intracranial hypotension (SIH) is a syndrome characterized by orthostatic headache, nausea, vomiting, photophobia, and diplopia. Subdural effusion, diffuse dural enhancement, dilatation of epidural veins, and increased height of hypophysis are cranial magnetic resonance (MR) imaging findings in SIH. Epidural blood patch is reportedly one of the effective treatment options. We present the follow-up MR imaging findings in a case of SIH after a successful epidural blood patch treatment. We propose that cranial MR imaging as an objective test to evaluate the success of epidural blood patch treatment.