We describe a family in which cutaneous malignant melanoma or cerebral
astrocytoma, or both, developed in eight members over three generatio
ns. Other malignancies also occurred with a lesser frequency. In two p
atients with both malignant melanoma and astrocytoma, the brain tumor
followed the diagnosis of melanoma by a period of 2 and 10 years and w
as the primary cause of morbidity and mortality. The findings in this
family may represent a newly described genetic disorder.