RecruitingDrug trialChronic Subdural Hematoma Treatment With Intra-Arterial Bevacizumab InjectionThe goal of this clinical trial is to test whether infusing bevacizumab into the middle meningeal arteries can be used to treat chronic subdural hematomas (cSDH). The main questions it aims to answer are: * Is bevacizumab infusion safe in cSDH patients? * Is bevacizumab infusion effective in treating cSDH?