Spinal subdural hematoma-Inverted Mercedes-Benz sign

Discussion:

The spinal subdural hematoma is a rare entity and it is much less common than the spinal epidural hematoma. On MRI, a preserved epidural fat is an important differentiating feature. The subdural blood collects in a special configuration known on imaging as "Inverted Mercedes-Benz sign"  with one anterior and two posterolateral collections limited by two lateral denticulate ligaments and a midline dorsal septum.

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