Uveal melanoma is the most frequent primary intraocular tumor. The etiology is unknown. Using neutral DNA polymorphisms on chromosomes 2, 3, and 8, we have detected loss of chromosome 3 alleles in 8 of 13 tumors and multiplication of chromosome 8 alleles in 6 of 11 tumors. No anomalies at a locus on chromosome 2 were found in 10 of 10 tumors. These results confirm and extend previous cytogenetic findings and suggest that a tumor suppressor gene on chromosome 3 and an oncogene on chromosome 8 may be involved in the formation or progression of this tumor.
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