In this case of subdural hematoma, the patient is conscious complaining of headache for about two weeks duration. No history of trauma. He has type II DM and receives antihypertensive treatment.

CT was requested and it revealed a large left sided extraaxial crescentic shaped subdural collection of different densities denoting different blood ages, it covers the right cerebral hemispheres and exerts mass effect in form of effacement of the underlying cortial sulci, compression of the left lateral ventricle and contralateral shift of the midline.

Recent (acute) bleeding appears hyperdense and mainly presents at the dependent part of the collection.

Virtually there is no differential diagnosis for this case, but in chronic cases when blood becomes of CSF density subdural hygroma should be considered as a radiological differential diagnosis.