Background And Objectives: Spontaneous intracranial hypotension is an uncommon but debilitating condition that commonly involves positional headaches and vertigo. One cause is cerebrospinal fluid (CSF) leakage from ventral dural defects from calcified spinal discs. Patients can undergo epidural blood or fibrin glue patches as treatment; however, in cases where the leak does not resolve, surgical repair of the dural tear may be warranted. We aim to describe a case series and technical notes for these patients.
Methods: Patients with spontaneous intracranial hypotension because of myelography-confirmed ventral dural defect from calcified thoracic disc, who were treated surgically between June 2020 and March 2024, were included in the study cohort. Demographic information, clinical course, and postoperative outcomes were collected. The surgical technique was also described based on an illustrative case.
Results: Twelve consecutive patients underwent surgery between June 2020 and March 2024 with postoperative records. The median age at the time of surgery was 41.5 years (range: 28-58 years). Male patients comprised 50% of the cohort. Dural defects were spread throughout the thoracic spine in the cohort. While all patients reported positional headaches, other symptoms included vertigo, pulsatile tinnitus, and neck pain. Median length of follow-up time was 6.5 weeks. There were no surgical complications or permanent neurologic deficits. All patients had radiologic cure of their leaks with absence of extradural CSF on postoperative MR imaging. Ten patients (83.3%) had complete resolution of spontaneous intracranial hypotension-related symptoms. Two patients did suffer from rebound headaches postoperatively.
Conclusion: The dorsolateral transdural surgical approach is a safe and effective method to repair type 1 CSF leaks caused by ventral dural defects. Our case series of 12 patients did not involve any surgical or immediate postoperative complications, and all patients had radiologic resolution of their leaks with relief of positional headaches. Two patients experienced continued headaches after treatment.
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