Headache and Pain Research

Original Article

Availability, Accessibility, and Utilization of Diagnostics and Therapeutics for Spontaneous Intracranial Hypotension in Asia: Soyoun Choi, Woo-Seok Ha, Soo-Jin Cho, Aynur Özge, Betül Baykan, Esme Ekizoglu, Kiratikorn Vongvaivanich, Koichi Hirata, Linh Tuyen Nguyen, Mamoru Shibata, Min Kyung Chu, Otgonbayar Luvsannorov, Ryotaro Ishii, Shengyuan Yu, Shih-Pin Chen, Shuu-Jiun Wang, Takao Takeshima, Tsubasa Takizawa, Vinh Khang Nguyen, Wei-Ta Chen, Yen-Feng Wang, Soo-Kyoung Kim, Mi Ji Lee; Received March 17, 2025 Accepted April 8, 2025 Published online June 16, 2025; DOI: https://doi.org/10.62087/hpr.2025.0005 [Epub ahead of print]

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Abstract PDF Supplementary Material: Purpose: Recent advances in imaging techniques have significantly enhanced the diagnosis of spontaneous intracranial hypotension (SIH). However, these developments have been reported mostly in Europe and the United States. This study aimed to evaluate the availability and utilization of diagnostic and treatment modalities for SIH in Asia, through a survey of regional headache specialists.
Methods
A literature search was conducted using PubMed, and members of the Asian Regional Consortium for Headache were contacted. Participants completed a two-step survey evaluating the availability, accessibility, and frequency of SIH diagnostic and treatment methods in their countries and institutions. Descriptive statistics were used to analyze the data.
Results
Twenty physicians from eight countries completed both rounds of the survey. Lumbar puncture, brain magnetic resonance imaging (MRI), and spinal MRI are widely available across Asia, but real-time imaging techniques—such as dynamic computed tomography myelography and digital subtraction myelography—that precisely localize cerebrospinal fluid leaks are less accessible. Blind or semi-targeted epidural blood patches (EBPs) are available at most centers, but are easily accessible in only about half of cases. Surgical interventions are rarely available.
Conclusion
Most diagnostic methods for SIH are available in Asia, despite some regional disparities. The utilization of EBP and surgical interventions remains somewhat limited. This highlights the need for greater awareness and standardization of diagnostic methods in Asia.

Case Reports

Mechanical Thrombectomy in Cerebral Venous Thrombosis Caused by Spontaneous Intracranial Hypotension: A Case Report with Novel Pathological Findings of Fibrin/Platelet-predominant Thrombus: Min Kyoung Kang, Eun Young Kim, Hye-Rim Shin; Headache Pain Res. 2024;25(2):122-127. Published online October 2, 2024; DOI: https://doi.org/10.62087/hpr.2024.0016

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Abstract PDF: This case report presents pathological findings in a rare case of cerebral venous thrombosis (CVT) caused by spontaneous intracranial hypotension (SIH) that was treated successfully with mechanical thrombectomy. The etiologies and prognosis of CVT vary, and CVT resulting from SIH is particularly uncommon and challenging to diagnose and manage. In this case, magnetic resonance imaging revealed signs consistent with both SIH and CVT, which contributed to the patient’s worsening weakness. The patient was treated with a combination of endovascular thrombectomy and epidural blood patch, followed by anticoagulation therapy, and recovered without any complications. A pathological analysis of the retrieved thrombus using hematoxylin and eosin staining showed a high proportion of fibrin and platelets, which could shed light on the mechanism of CVT induced by SIH under conditions of low blood flow due to venous engorgement.

Spontaneous Intracranial Hypotension after Airplane Travel: Ho Jin Hwang, Jiyun Park, Sun Jae Moon, Dong Hyun Hwang, Kyongha Baek, Young Seo Kim; Korean J Headache. 2023;24(2):77-79. Published online December 31, 2023

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Abstract PDF: Spontaneous intracranial hypotension usually manifests orthostatic headache caused by cerebrospinal fluid leakage without procedure or trauma to meninges. There was temporal relationship between intracranial hypotension and various precipitating factors such as positional changes, valsalva maneuver, minor trauma and only rarely airplane travel. Here, we report the first korean case of spontaneous intracranial hypotension after airplane travel. A 37-year-old woman presented with orthostatic headache after airplane travel. Her cerebrospinal fluid pressure is 55 mmCSF and cervical spinal level of cerebrospinal fluid leakage confirmed by cisternography. Her symptoms resolved after the epidural blood patch and she was later discharged without any complications.

Paradoxical Postural Headache in Spontaneous Intracranial Hypotension with Infratentorial Superficial Siderosis: Dae Woong Bae, Min Seung Kim, Soo-Jin Cho; Korean J Headache. 2023;24(1):20-23. Published online June 30, 2023

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Abstract PDF: Spontaneous intracranial hypotension is characterized by orthostatic headache caused by cerebrospinal fluid (CSF) leakage. However, clinical presentation of SIH is variable, and normal or high intracranial pressure in CSF study is not uncommon. Infratentorial superficial siderosis (ISS) shares similar pathomechanism with SIH, as developed after chronic CSF leakage, whilst several years of latency after SIH onset. Here, we report a 47-year-old male patient who had experienced prominent orthostatic headache twenty years before, and presented reverse-orthostatic headache in this time, accompanying with radiological features of SIH and ISS in brain magnetic resonance imaging (MRI). CSF leakage was confirmed by spinal MRI and MR myelography, and his headache was aggravated after epidural blood patch.

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