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Electroencephalograhic Analysis of Malignant Melanoma Patients

EEGs carried out in 202 patients with melanoma were abnormal in 33%. In the absence of systemic or brain metastasis 14% of the patients had abnormal records. If systemic metastases without brain metastasis were present 45% of the patients had abnormal records and with brain metastasis 88% had abnormal EEGs. Only a third of the patients with abnormal records had brain metastasis but metastatic spread to some organ system was present in 76% of those with EEG abnormalities. The diffuse abnormality was less likely to be a "false positive." Ninety-seven percent of the patients with diffuse EEG abnormality had systemic metastasis but 43% of the patients with focal EEG changes had no detected metastasis.