Preliminary genetic investigation of the patient with atypical long (55 years) malignant melanoma process
Malignant melanoma of the skin usually has a dramatic course and the prognosis is usually not successful. For this reason, the case of a patient with a 55-year survival after being diagnosed with the said cancer cancer is a relatively unusual event. In an attempt to explain this case, we used a comet assay on the patient's peripheral lymphocytes in between surgical procedures, with γ-ray irradiation of the cells at a dose of 2Gy, compared to two other melanoma patients and four healthy subjects. In both of these comparative melanoma patients, we found increased relative to healthy subjects healthy individuals baseline DNA damage combined with reduced damage repair capacity. The patient, described in this paper, admittedly showed greater radiation damage to genetic material than control patients and healthy subjects, but the kinetics of DNA break repair DNA after a 180-minute incubation was significantly higher in him. Consistent with the hypothesis of a relationship between polymorphisms of cytochrome P-450 genes, encoding detoxification enzymes, with susceptibility to melanoma, we genotyped CYP2D6 (*3,*4), CYP2C9 (*2, *3), CYP2C19 (*2) using the TaqMan technique, showing that with the exception of CYP2C9*2, all other genotyped loci were heterozygous.





