Adult patient with frontal scalp swelling.
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Selected images from an MRI with contrast demonstrate a very large bifrontal extraaxial mass which has a large dural base and enhances homogeneously. The frontal bone, especially on the left demonstrates abnormal signal with a small amount of extension beneath the scalp.
The main differential is between a haemangiopericytoma and a meningioma.
The mass was resected and histologically proven to be an anaplastic meningioma.