Metastatic Melanoma

Findings:
Large masses are present  in the left frontal lobe and midline posterior cerebellum, with smaller multifocal lesions in the high gray/white junction. The larger lesions show nodular enhancement and hyperintensity on T1WI. The smaller lesions show marked blooming on T2WI indicative of blood products.

Discussion:
        -hyperintensity on T1 in this case= combination of hemorrhage (methemoglobin) and/or melanin
       -ddx:
            -hemorrhagic mets (melanoma, thyroid, renal, lung etc.)
            -multiple cavernomas (usually no edema or masslike enhancement)

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