Ocular complications of persistent hyperplastic primary vitreous in three dogs

Persistent hyperplastic primary vitreous (PHPV) syndrome associated with ei ther severe ocular complications or multiple ocular lesions was diagnosed i n three young dogs, a Samoyed, a Spanish Pachon, and a mixed breed dog. Due to opacification of the anterior ocular structures, B-mode and color-flow Doppler ultrasonography were performed to aid diagnosis. The Samoyed presen ted with unilateral hyphema; the Spanish Pachon presented with unilateral s econdary glaucoma associated with uveitis and hyphema OD and leucocoria OU; and the mixed breed presented with bilateral leucocoria. B-mode ultrasonog raphy of the Samoyed revealed a subcapsular cataract and a hyperechoic tubu lar structure attached from the optic disk to the posterior lens capsule. I n the Spanish Pachon B-mode ultrasonography of the right eye indicated micr ophakia, cataract formation, and a retrolental mass with a thin hyperechoic strand stretching from the optic disk to the posterior lens; and for the r ight eye cataract formation, PHPV, retinal detachment, and vitreous hemorrh age. In the mixed breed dog, B-mode ultrasonography of both eyes indicated microphthalmia, retrolental mass, and hyperechoic lenses. By color-flow Dop pler imaging, blood flow was present in the retrolental mass of the right e ye suggesting a persistent hyaloid artery.