Abstract
Hereditary hyperferritinaemia cataract syndrome (HHCS) is an autosomal dominant disorder characterised by early onset cataracts and increased serum L-ferritin concentration. Affected individuals show nucleotide substitutions in the region of the L-ferritin gene (FTL) that encodes a regulatory sequence within the (mRNA)FTL termed the iron responsive element (IRE). We report the clinical features of seven HHCS kindreds containing 49 individuals with premature cataract. All the probands received diagnoses of HHCS after the incidental discovery of increased serum L-ferritin concentration (median 1420 μg/l; normal range 15–360 μg/l), in most cases during investigation or screening for anaemia. All the probands developed characteristic ‘sunflower’ morphology cataracts in childhood (median age at diagnosis 5 years), but had no other phenotypic features. All the affected kindreds showed nucleotide substitutions in FTL that were predicted to disrupt function of the (mRNA)FTL IRE. The severity of the clinical phenotype of HHCS was variable both within and between kindreds and showed no clear relationship to FTL genotype. HHCS should be included in the differential diagnosis of hyperferritinaemia and should be carefully distinguished from hereditary haemochromatosis. Measurement of the serum L-ferritin concentration should be included in the investigation of all individuals with early onset cataracts.
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Lachlan, K., Karen Temple, I. & Mumford, A. Clinical features and molecular analysis of seven British kindreds with hereditary hyperferritinaemia cataract syndrome. Eur J Hum Genet 12, 790–796 (2004). https://doi.org/10.1038/sj.ejhg.5201252
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DOI: https://doi.org/10.1038/sj.ejhg.5201252
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