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Prognostic value of S-100-beta serum concentration in patients with uveal melanoma.

BACKGROUND
In cutaneous melanoma, the S-100-beta serum level is recognized as a marker of metastatic disease.


OBJECTIVES
To determine whether S-100-beta is present in the serum of patients with uveal melanoma and to test whether the serum concentration of S-100-beta is related to known clinical and histopathological prognostic factors in these patients.


METHODS
The S-100-beta concentration was measured in serum samples collected from 64 patients with uveal melanoma before enucleation and from 58 healthy control subjects. A 2-site immunoluminometric assay was used to quantify the S-100-beta concentration in serum. S-100-beta concentrations in the serum from patients were compared with clinicopathological tumor variables, sex, occurrence of metastasis, and survival.


RESULTS
Thirty-seven (57.8%) of 64 patients with uveal melanoma showed detectable levels of serum S-100-beta. There was, however, no significant difference between serum levels of patients and control subjects (P =.71). Statistical analysis showed no significant correlation between S-100-beta concentration and any of the clinicopathological tumor variables, occurrence of metastases, or survival. Only sex was correlated with S-100-beta serum levels, which was not observed in the control group.


CONCLUSIONS
In our study on patients with uveal melanoma, the S-100-beta serum concentration was not correlated with any investigated prognostic factor and was not of prognostic value itself. Female patients appeared to have higher S-100-beta concentrations than male patients.