Eye
Retina
Retinitis pigmentosa


Topic Completed: 1 February 2014

Minor changes: 27 June 2020

Copyright: 2004-2019, PathologyOutlines.com, Inc.

PubMed Search: Retinitis pigmentosa [title] review[ptyp] pathology

Nat Pernick, M.D.
Page views in 2019: 180
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Cite this page: Pernick N. Retinitis pigmentosa. PathologyOutlines.com website. https://www.pathologyoutlines.com/topic/eyeretinaretinitispigmentosa.html. Accessed August 13th, 2020.
Definition / general
  • Various inherited retinal disorders that are not actually inflammatory
  • Common (incidence of 1/3600) with variable inheritance or as part of Refsum disease
  • Usually causes loss of rods and cones to apoptosis and focal proliferation of retinal pigment epithelium
  • Loss of rods causes early night blindness and restricted visual fields (bilateral loss of peripheral vision)
  • Loss of cones affects central visual acuity
  • Retinal atrophy causes constriction of retinal vessels, optic nerve head atrophy and accumulation of retinal pigment around blood vessels
Microscopic (histologic) description
  • Migration of macrophages and retinal pigment epithelial cells with melanin into retina, particularly around vessels
  • Also atrophy of photoreceptors in retina and choriocapillaris
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