Computer tomography in the diagnosis of persistent hyperplastic primary vitreous body

The authors described and evaluated clinical and CT pictures of five children with persistence of hyperplastic primary vitreous body originating due to regression of embryonal hyaloid vascular system. It becomes clinically manifest especially in leucocoria, reduced globe of the eye, prolonged ciliary processi and the formation of fibrovascular changes behind the lens. CT picture is characterized by a) increased density of vitreous body, b) dense stripes going in retrolental direction and in the course of the Cloquet canal, c) microphthalmus, d) absence of calcifications and e) facultative changes on the lens and anterior chamber. These signs represent an important criterium for differentiating persistence of hyperplastic primary vitreous body from retinoblastoma.