1. A 43-year-old woman initially diagnosed with Chiari I and treated with surgical decompression.
A 43-year-old woman initially diagnosed with Chiari I and treated with surgical decompression. The patient had persistent headaches and recurrent pseudomeningoceles at the surgical site. The patient was ultimately diagnosed with IIH and underwent ventriculoperitoneal shunt surgery with symptomatic relief. A, Sagittal T2-weighted image shows a peglike herniation of the cerebellar tonsils (arrow). However, a partially empty sella is also noted (arrow), which could have been a clue to the underlying or coexistent IIH. B and C, Sagittal and axial T2WI shows the postsurgical changes from suboccipital craniectomy and a complex extracranial fluid collection, compatible with pseudomeningocele (arrow).
A.H. Aiken et al. AJNR Am J Neuroradiol 2012;33:
©2012 by American Society of Neuroradiology