Steroid for Treatment of Acute/Subacute Severe Cerebral Venous Thrombosis.

Inclusion Criteria: * Acute or subacute severe CVT, determined by the onset-to-admission time (≤ 15 days) or symptom aggravation-to-admission time (≤ 15 days) and MRI+MRV/MRBTI (MR Black-Blood Thrombus Imaging), or CT+CTV Exclusion Criteria: * younger than 14 years； * foreign nationality； * receiving steroids before the onset of CVT； * patients with other serious diseases； * Presenting with neurological deficits before the onset of CVT； * lack of baseline data before treatment； * receiving steroids during hospitalization for other reasons but the dosage did not reach pulsed-therapy level * brain herniation but refusing to undergo decompressive craniectomy, or pupillary light reflex did not recover after decompressive craniectomy