ABSTRACT
Chronic subdural haematona (CSH) is one of the great mimicker in neurology and usually leading to misdiagnosis, because the symptoms and sign are variable. Most patients usually had no previous history of head injury. Bilateral subdural haematoma is even more different to diagnosis and it is one of the most life threatening condition, but fortunately it is a very rare event. We report a 52 year old man who had suffered from severe headache for 1 mouth and later developed confusion. CT scan and lumbar puncture were done at the other hospital. But the diagnosis was dubious and paracetamol was prescribed. He was referred to Siriraj Hospital by himself. Repeated lumber puncture was done and the result was still normal then he was consulted but his previous neuroimagine revealed bilateral isodensity subdural haematoma. Haemolytic clot from subdural haematoma was removed bilaterally in the same day which resulted in complete resolution of confusion and headache.