A female presenting with progressive visual defect is diagnosed to have retinitis pigmentosa. All of the following conditions are associated with retinitis pigmentosa, EXCEPT:
Some forms of retinitis pigmentosa occur in association with rare, hereditary systemic diseases like olivopontocerebellar degeneration, Bassen-Kornzweig disease (abetalipoproteinemia), Kearns-Sayre syndrome, Refsum's disease, and neuropathy, ataxia, and retinitis pigmentosa (NARP) syndrome. Chronic treatment with chloroquine, hydroxychloroquine, and phenothiazines (especially thioridazine) can produce visual loss from a toxic retinopathy that resembles retinitis pigmentosa. Hallervorden-Spatz disease or neurodegeneration with brain iron accumulation 1 (NBIA1) or pantothenate kinase-associated neurodegeneration (PKAN), is characterized by extrapyramidal and cognitive abnormalities, dysahria, dysphagia, and ocular abnormalities (eg, gaze palsies, optic atrophy). Ref: Hoon J.C. (2012). Chapter 28. Disorders of the Eye. In D.L. Longo, A.S. Fauci, D.L. Kasper, S.L. Hauser, J.L. Jameson, J. Loscalzo (Eds), Harrison's Principles of Internal Medicine, 18e.
Refsum's disease
Hallervorden-Spatz disease
NARP
Abetalipoproteinemia