Persistent hyperplastic primary vitreous.
Persistent hyperplastic primary vitreous (PHPV) is a common congenital developmental anomaly of the eye that results following failure of the embryological, primary vitreous and hyaloid vasculature to regress. It typically presents unilaterally without associated systemic findings. Although the etiology is assumed to be identical in each of its three variants, PHPV is still subclassified into three presentations. The purely anterior presentation of PHPV is also known as persistent tunica vasculosa lentis and persistent posterior fetal fibrovascular sheath of the lens. It occurs in eyes with pathology of the anterior segment. This form typically involves cataract, glaucoma and a retrolenticular membrane. The purely posterior presentation of PHPV is termed falciform retinal septum and ablatio falcicormis congentia. It occurs in eyes with abnormalities confined to the posterior segment such as retinal folds, vitreal stalk, vitreal membranes, macular abnormalities and optic disc abnormalities. A combination of anterior and posterior presentations is the most commonly seen clinical presentation. Case report. We present a case in which an 11-year old male was referred to our office for reevaluation of a large angle esotropia, strabismic and deprivational amblyopia and previously diagnosed PHPV, OD. Conclusion. Without treatment, PHPV can produce recurrent intraocular hemorrhage, secondary glaucoma and eventually require enucleation. Early surgical intervention is necessary to prevent progressive pathologic changes and to obtain the best visual results. Finally, while PHPV is a documented source of leukocoria, clinicians should be aware of differential diagnoses which involve the white pupil (congenital cataract, retinoblastoma, Norrie's disease, retinopathy of prematurity, retinal detachment and Coat's disease).