Chiari Decompression in Patients with Spontaneous Intracranial Hypotension: Presenting Symptoms and Treatment Response
Abstract
Spontaneous intracranial hypotension (SIH) is a debilitating and often misdiagnosed condition. One important differential diagnosis is Chiari malformation type I, which differs markedly in its pathophysiology, clinical manifestation, and treatment. We describe 7 patients with SIH, initially misdiagnosed as having Chiari malformation type I, who underwent posterior fossa decompression. Five patients developed temporary symptom relief after posterior fossa decompression, and 6 patients developed rebound intracranial hypertension. Our findings emphasize the importance of considering SIH when evaluating low-lying cerebellar tonsils to prevent unnecessary procedures and delays in appropriate treatment.
Fields of Study & Subjects
Neurosurgical Procedures and Complications
Spinal Dysraphism and Malformations
Cerebral Venous Sinus Thrombosis
Publication details
- Journal / source
- American Journal of Neuroradiology
- Volume
- 47
- Issue
- 9
- Pages
- 2448–2453
- Publication date
- 7 February 2026
- Language
- EN