Chronic subdural hematoma / PGS / diagnostics

CHSDH is bleeding that occurs without an obvious history and may be an accidental finding on imaging. However, it usually has a clinical correlate, where the dominant finding is a headache, mental alteration event, focal neurological symptoms. A similar clinical finding is found in late posttraumatic subdural hygroma, which arises after arachnoid rupture, when the expansion process consists only of cerebrospinal fluid without a significant blood admixture. Chronic subdural hematoma is not a developmental stage of acute subdural hematoma, but a different nosological unit.