[Study of the expression of embryonal choroidal tissue-specific markers]

The authors used the human embryonal eye to conduct immunohistochemical studies employing the tissue-specific markers of the melanocytic series (HMB45, tyrosinase, melanin A, and MITF) and neuronal differentiation (S100), as well as the markers of intermediate and muscular filaments (vimentin, desmin, smooth muscle actin). The nature of antigen expression was analyzed in different structures and portions of the vascular tract of the eye. The findings unveil the possibility of differentiating the vascular tract tumors of various genesis and their sites, by applying a plate containing the above markers.