Rapid enlargement of subdural haematoma.

A case of subdural haematoma (SDH) having atypical features (headache, vomiting, drowsiness but normal haematological and metabolic parameters and no localising neurological signs) is reported. The SDH rapidly enlarged and liquefied in five days as evident on computerised tomographic (CT) scan and operative findings. Rapid improvement was observed following this. Abnormally excessive fibrinolytic activity in the SDH is a possible cause.