35 years, Female, increase in headache intensity and frequency. History of Chiari decompression in 2013. Again seen are postsurgical changes of Chiari decompression including suboccipital craniectomy and resection of the C1 posterior arch. CSF spaces at the foramen magnum are grossly preserved ventrally and dorsally with biphasic flow.Remainder of the brain parenchyma is essentially unremarkable. Ventricles remain normal in size. Incidentally noted is a tiny punctate focus of susceptibility and enhancement involving the right anterior pons which is consistent with a tiny capillary telangiectasia. No evidence of ischemia or hemorrhage. No intracranial mass or mass effect. No abnormal enhancement. Minimal scattered mucosal thickening is present within the paranasal sinuses.
1. Postoperative changes of Chiari I decompression are again seen. Biphasic CSF flow at the foramen magnum is preserved.2. Remainder of the brain appears within normal limits.