What is the cause of subacute sclerosing panencephalitis?

Subacute dural panencephalitis is a panencephalitis characterized by white matter and gray matter damage. The main cause is chronic infection with measles virus. Whether measles virus becomes defective and continues to infect the body is related to immune regulatory defects. once the patient shows clinical symptoms such as loss of cerebral cortex function, hypotonia, infection, ataxia, amnesia, etc., he must actively go to the hospital for systematic detection, such as immunoglobulin detection and cerebrospinal fluid detection, and MRI CT detection to make a definite diagnosis.