![]() This condition tends to run in families and is treatable if diagnosed early. If CHRPE occurs in both eyes, it has been found to be associated with familial adenomatis polyposis (FAP). ICD-10-CM H35.52 is grouped within Diagnostic Related Group(s) (MS-DRG v40. Answer: Bear tracks are a form of congenital hypertrophy of the retinal pigment epithelium (CHRPE or chirpy). Hereditary, progressive degeneration of the neuroepithelium of the retina characterized by night blindness and progressive contraction of the visual field.Group of inherited abnormalities in the retina characterized by night blindness, retinal atrophy, weakening of the retinal vessels, pigment clumping, and contraction of the visual field.It is manifested with decreased vision in low light or in the night, followed by decreased peripheral vision, and, eventual decreased central vision. A rare inherited retinal dystrophy disorder characterized by spots of black bone-spicule pigmentation of the retinal pigment epithelium. ![]() Right retinitis pigmentosa (eye condition). ![]()
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