Trauma--Subdurals--Isodense

Neuroradiology Teaching File

Acute Subdural Hematoma

Findings: There is a moderately sized hyperdense crescentic extraaxial fluid collection overlying the right frontal lobe. Associated midline shift to the left and mass effect on the frontal horn of the right lateral ventricle and cortical sulci of the right frontal lobe is seen.

Discussion: Most (85%) subdural hematomas are unilateral, commonly occurring in the frontoparietal convexities, and the middle cranial fossa. Acute subdural hematomas are usually diffusely hyperdense. However, they can have a mixed attenuation of hyperdense and hypodense areas, which represents unclotted blood in the hematoma.

References: Osborn A: Craniocerebral Trauma. In Diagnostic Neuroradiology, pp 205-212, St. Louis: Mosby, 1994
Case prepared by Steven Lee, M.D. and Anthony L. Alcantara, M.D.

Acute Subdural Hematoma

Findings: There is a moderately sized hyperdense crescentic extraaxial fluid collection overlying the right frontal lobe. Associated midline shift to the left and mass effect on the frontal horn of the right lateral ventricle and cortical sulci of the right frontal lobe is seen.

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