[Medullary thyroid carcinoma metastasizing to the choroid, ciliary body and iris: clinical and pathological findings in two cases (author's transl)].

Two cases (four eyes) of medullary thyroid carcinoma with metastases in the choroid, ciliary body and iris are described for the first time. In one eye the choroidal metastases were destroyed clinically by photo- and cryocoagulation. In another eye coagulation of a tumor may have facilitated transscleral extension into the orbit. The clinical conclusions arising from the pecularities of these tumors are discussed. It is particularly striking that in 2 patients with this rare tumor metastases developed in the anterior uvea in all four eyes.