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  • Title: Syndromic retinitis pigmentosa: ERG and phenotypic changes.
    Author: Fleischhauer J, Njoh WA, Niemeyer G.
    Journal: Klin Monbl Augenheilkd; 2005 Mar; 222(3):186-90. PubMed ID: 15785977.
    Abstract:
    PURPOSE: Our aim was to review the phenotype and extent of ERG changes in syndromic RP (SRP). PATIENTS AND METHODS: A retrospective review of charts of 82 patients seen over the last 20 years with SRP was carried out. Clinical data were compared with changes in ERG. Full-field ERGs comprised selective rod-driven, maximal dark-adapted mixed responses, and isolated cone-driven signals. Occasionally, ERGs were recorded under brief general anaesthesia. ERG changes were classified as normal, reduced or extinguished. RESULTS: Syndromic RP was diagnosed for the following entities: Usher (45 patients), Laurence-Moon-Bardet-Biedl (LMBB, 17 patients), Kearns-Sayre (10), Batten (6), Refsum (3), Senior-Loken (1). ERG changes varied in every subgroup and were therefore not specific for the syndromes. CONCLUSION: There was wide variation of clinical presentation in SRP, much as seen in isolated RP, often without obvious ophthalmoscopic changes. ERG testing is a prerequisite for differential diagnosis as well as for early detection of multiple handicaps.
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