Bilateral subacute subdural hematoma

Case contributed by Dr Ammar Haouimi


progressively altered consciousness with no history of trauma.

Patient Data

Age: 75 years
Gender: Male

Bilateral crescent-shaped frontoparietal subdural collection (maximum thickness 28 mm on the right and 23 mm on the left). It elicits a high signal intensity on T1, T2, and FLAIR sequences with internal septation and sediment of low signal on T2 and GE sequences, indicating a late subacute subdural hematoma (methemoglobin free).

Note symmetrical mass effect on the midline structures with no subfalcine herniation.

Case Discussion

MRI features of late subacute subdural hematoma (extracellular methemoglobin).

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