The authors investigated a group of 51 patients (29 men and 22 women) with intraocularmelanoma: 41 patients with melanoma of the chorioid,10 patients with melanoma of the ciliary body. They evaluated the clinical and pathological finding according to the TNM classification recommended by UICC (International Union AgainstCancer).In all investigated patients they assessed circulatingtumour cells (melanocytes) in the peripheral blood stream based on the detection of mRNA tyrosinase and marker MART 1. When evaluating the presence of markers according to the diagnosis irrespective of time, they found in patients in the clinical stage of T2 chorioidal melanoma a 19% positivity of differentmarkers and very rare a concurrent positivity of both markers. Patients in the clinical stage T3 had a 51% positivity of one marker and 34% concurrent positivity of both markers. In melanoma of the ciliary body evidence of individual markers was positive in 17% and only in 11% both markers were positive concurrently. On comparison of therapeutic procedures fromthe aspect of development in time in patients treated by brachytherapy only rare positivity was found at the time of administration the radioactive plaque, following an eight-month interval after brachytherapy the positivity of markers increased to 28 %. On evaluation of markers of choroidal melanoma and ciliary body melanoma resolved by enucleation had their positivity at the time of operation was 36 %, and during check-ups up to one year or longer it persisted at similar levels. Concurrent presence of both markers before this operation was rare, during postoperative check-up examinations it was within a range of 23 and 33 %. The presence of both markers was repeatedly proved in five patients with choioidal melanoma after enucleation of the eye, in four of them in direct correlation with a metastatic process.

        Key words: melanoma of the uvea, melanoma markers, tyrosinase, MART I