Brain metastases of an amelanotic melanoma as the primary manifestation in a 15-year old boy.

A 15-year old boy was admitted to hospital with an acute left hemiparesis because of a 3.5 cm-diameter-tumor in the right frontoparietal region. In CCT 4 other tumors were to be seen in both hemispheres after giving contrast medium. Upon a diagnostic operation, a hemorrhage into a metastasis of an amelanotic melanoma was found. The boy survived 2.5 months. In the pathological examination the primary tumor was not found, but there were 12 other intracerebral metastases and two metastases in the left lung and the thyroid gland. Histologically it was an amelanotic melanoma.