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Hypertrophic retinal pigment epithelium (second type)

The second type of CHRPE are unilateral, multifocal, and clustered lesions of hypertrophy that are sometimes called "bear tracks." Their size is not always "track like" as seen by comparing the figures. (Contributed by Dr. James Walters.)

Associated Disorders

  • Bassen-Kornzweig disease
  • Cushing syndrome
  • Kearns-Sayre syndrome
  • Lawrence-Moon-Biedl syndrome
  • Mitochondrial encephalopathy with lactic acidosis and stroke-like episodes (MELAS)
  • Ocular paraneoplastic syndromes
  • Refsum disease
  • Usher syndrome
  • gastroesophageal reflux disease
  • posterior vitreous detachment
  • retinal detachment
  • systemic arterial hypertension
  • systemic lupus erythematosus