Metastatic melanoma to brain
Past history of melanoma, now presents with confusion and drowsiness ? melanoma metastases
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Multiple hyperdense mass lesions throughout the brain. Most do not have surrounding vasogenic edema but some do as is typical of metastases.
Hyperdense metastases to the brain are unusual and include the primary sites of lung, breast, GI tract and melanoma as in this case. The density in melanoma is either due to blood product (hemorrhagic mets) or the melanin itself. Calcifaction can also cause increased density in metastases including post radiotherapy.