Diseases and Abnormalities at or Before Birth

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Familial Cerebral Cavernous Malformation

Patients with cerebral cavernous malformation and associated with epilepsy will undergo MR imaging and be followed-up annually as our protocol defined.

Patients with cerebral cavernous malformation but without epilepsy will undergo MR imaging and be followed-up annually as our protocol defined.

Li Ma, MD, PhD

Yuanli Zhao, MD

Chunxue Wu, MD

Zongze Li, MD

Cerebral cavernous malformation (CCM)-related epilepsy (CRE) impairs the quality of life in patients with CCM. Patients could not always achieve seizure freedom after surgical resection of the lesion, suggesting an inadequate treatment and evaluation of the epileptogenic zone or network. Iron deposition in cerebral cavernous malformations has been postulated to play an important role in triggering CRE. Quantitative susceptibility mapping (QSM), as an optimal in vivo imaging technique to quantify iron deposition, is employed to analyze the iron quantity in CCM patients with epilepsy and further combined with brain structural and connectome analysis, to describe the difference between CCMs with and without epilepsy. In vivo biomarkers predicting CRE risk in CCM natural history and CRE control outcome after CCM surgical resection will be further identified to improve management strategy.

The CRESS study is a prospective observational study of imaging biomarker for cerebral cavernous malformation (CCM) related epilepsy (CRE) risk in natural history or after surgical resection. This project, funded by the National Nature Science Foundation of China, will be performed in two sites: Bejing Tiantan Hospital, Capital Medical University and Peking University International Hospital, which cover the south and north part of Beijing. Bejing Tiantan Hospital is also the China National Clinical Research Center for Neurological Diseases and the largest neurological center with high volume of patients all over the nation.

Study overview: Each participants will be followed for 5 year since enrollment. Epilepsy will be tracked with serial video EEG recordings and clinical investigations performed annually. Besides medical history of the patients, data from seizure diary and MR imaging studies (including quantitative susceptibility mapping, diffusion tensor imaging and three dimension-T1 weighted imaging), will be collected. Blood samples and tissue samples of surgical resected lesion for biomarkers studies will also be collected in all participants of the project. The data obtained in participants of CCM with or without epilepsy will be compared.

Sample size: Investigators plan to enroll 200 CCM patients in 24 months and follow up for 5 years. Based upon the preliminary results and extensive literature review, investigators predict that about 50% of participants will undergo surgical treatment, while 25% of participants remain suffering from seizure after treatment.

Study endpoints: The primary clinical endpoint of this study is a collection of a set of clinical, molecular, and MRI data in all participants.

Surgical resected lesion and 20 ml blood sample before surgery

Quantitative Susceptibility Biomarker and Brain Structural Property for Cerebral Cavernous Malformation Related Epilepsy

Quantitative Susceptibility Mapping Biomarker, Brain Structure and Connectome Associated With Cerebral Cavernous Malformation Related Epilepsy and Outcome After Surgery

Study Protocol to be published in peer-reviewed journal

Each patient contributes five outcome measurements (at annual image of 5-year follow-up). Perilesional QSM measurements will be performed at baseline and at annual epoch of image. Perilesional mean QSM (in parts per million, ppm) in each study group will be evaluated using univariate comparison and a repeated measures analysis implemented as an unadjusted linear mixed model.

Each patient contributes three outcome measurements (at year 1 and 2 and 3 after surgery). Perilesional QSM measurements will be performed at annual imaging follow-up after surgery. Mean QSM (in parts per million, ppm) in patients with or without postoperative seizure will be evaluated using univariate comparison and a repeated measures analysis implemented as an unadjusted linear mixed model.

Seizure freedom, defined as Engel Classification of Post-treatment Outcome Class I, will be assessed annually during follow-up period. For patients with medical treatment or conservative observation, the follow-up period begins since enrollment. For patients with surgical resection, the follow-up period begins after surgery.

The presurgical grey matter volume will be calculated from three dimension T1 weighted imaging. Data of CCM with or without epilepsy will be compared and to detect the correlation between grey matter volume and seizure severity (Liverpool Seizure Severity Scale) and frequency.

Whole-brain connectome will be reconstructed from whole-brain diffusion tensor imaging before surgical treatment. Data of CCM with or without epilepsy will be compared.

Study title	NCT ID	Conditions	Interventions	Eligibility	Organization	Link
Quantitative Susceptibility Biomarker and Brain Structural Property for Cerebral Cavernous Malformation Related Epilepsy	NCT04076449	Cavernous Malfo... Cavernous Angio... Cavernous Heman... Cavernous Heman... Seizures Seizures, Epile... Epilepsy		18 Years - 70 Years	Beijing Tiantan Hospital
Quantitative Susceptibility Biomarker and Brain Structural Property for Cerebral Cavernous Malformation Related Epilepsy	NCT04076449	Cavernous Malfo... Cavernous Angio... Cavernous Heman... Cavernous Heman... Seizures Seizures, Epile... Epilepsy		18 Years - 70 Years	Beijing Tiantan Hospital

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