PROGNOSTIC INDICATORS FOLLOWING ENUCLEATION FOR POSTERIOR UVEAL MELANOMA - A MULTIVARIATE-ANALYSIS OF LONG-TERM SURVIVAL WITH MINIMIZED LOSS TO FOLLOW-UP

Most previous reports on survival following enucleation for uveal mali gnant melanoma do not contain cumulative survival rates, do not use a multivariate approach and are liable to a considerable loss to follow- up. In this study, the long-term survival and tumour-related mortality were studied in 340 patients. Archival specimens containing posterior uveal melanomas were initially examined and sectioned by one patholog ist. There was no loss to follow-up 6 to 22 years after enucleation. A t the end of study, 233 (68.5%) individuals were dead; 137 (40.3%) of melanoma-related causes and 96 (28.2%) of other causes. Melanoma-relat ed deaths appeared from 24 to 6848 days (18 years 8 months) after enuc leation. The cumulative 5-year survival proportion based on melanoma-r elated deaths was 70% and the corresponding 10-year proportion was 56% . Multivariate Cox regression indicated that tile largest tumour dimen sion, cell type, and tumour location all had independent prognostic va lue, the associated hazard ratios ranged from 1.2 to 1.4, suggesting a moderate increase of the relative risk. Pair-wise comparisons of the parameters indicated that large tumours were more common in the anteri or choroid or ciliary body than in the posterior choroid. Similarly la rge tumours were more often necrotic, composed of epitheloid cells, or featured extrascleral extension. Tumours with significant scleral inv asion or extrascleral extension were more common in elderly patients.