Clinical and genetic variability in children with partial albinism

Patrick Campbell, Jamie M Ellingford, Neil R A Parry, Tracy Fletcher, Simon C Ramsden, Theodora Gale, Georgina Hall, Katherine Smith, Dalia Kasperaviciute, Ellen Thomas, I Chris Lloyd, Sofia Douzgou, Jill Clayton-Smith, Susmito Biswas, Jane L Ashworth, Graeme C M Black, Panagiotis I Sergouniotis

Research output: Contribution to journalArticlepeer-review


Individuals who have ocular features of albinism and skin pigmentation in keeping with their familial background present a considerable diagnostic challenge. Timely diagnosis through genomic testing can help avert diagnostic odysseys and facilitates accurate genetic counselling and tailored specialist management. Here, we report the clinical and gene panel testing findings in 12 children with presumed ocular albinism. A definitive molecular diagnosis was made in 8/12 probands (67%) and a possible molecular diagnosis was identified in a further 3/12 probands (25%). TYR was the most commonly mutated gene in this cohort (75% of patients, 9/12). A disease-causing TYR haplotype comprised of two common, functional polymorphisms, TYR c.[575 C > A;1205 G > A] p.[(Ser192Tyr);(Arg402Gln)], was found to be particularly prevalent. One participant had GPR143-associated X-linked ocular albinism and another proband had biallelic variants in SLC38A8, a glutamine transporter gene associated with foveal hypoplasia and optic nerve misrouting without pigmentation defects. Intriguingly, 2/12 individuals had a single, rare, likely pathogenic variant in each of TYR and OCA2 - a significant enrichment compared to a control cohort of 4046 individuals from the 100,000 genomes project pilot dataset. Overall, our findings highlight that panel-based genetic testing is a clinically useful test with a high diagnostic yield in children with partial/ocular albinism.

Original languageEnglish
Pages (from-to)16576
JournalScientific Reports
Issue number1
Publication statusPublished - 12 Nov 2019


Dive into the research topics of 'Clinical and genetic variability in children with partial albinism'. Together they form a unique fingerprint.

Cite this