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Ophthalmic Genet. 2014 Apr 28. [Epub ahead of print]

Ocular Findings in Patients with the Hermansky-Pudlak Syndrome (Types 1 and 3).

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  • 1Ophthalmology Department, School of Medicine, Medical Sciences Campus, University of Puerto Rico , San Juan , Puerto Rico .

Abstract

Abstract Purpose: To describe and compare ocular findings in patients with Hermansky-Pudlak syndrome (HPS) type 1 and 3. Methods: This is a retrospective case series of 64 patients with HPS from 1999 to 2009 evaluated at an outpatient private ophthalmologic clinic. Patients underwent genetic analysis of selected albinism (Tyrosine and P gene) and HPS genes (HPS-1 and HPS-3) by screening for common mutations and exon sequencing with DNA screening. Descriptive and non-parametric statistical analyses were carried out. Results: Nearly 70% of the patients were homozygous for common Puerto Rican mutations leading to the HPS1 gene (16-BP DUP, 53.6%), while 30% had the 3904-BP DEL HPS3 gene mutation. Best corrected visual acuity (BCVA) was poorer in patients with type 1 HPS than in patients with type 3 HPS (p < 0.001), esotropia was more common among type 1 HPS patients (p < 0.018), while exotropia was more common among patients with type 3 HPS. Total iris transillumination was more common in patients with type 1 HPS and minimal iris transillumination in patients with type 3 HPS (p < 0.001). The maculae were translucent in patients with type 1 HPS, while patients with type 3 HPS had opaque maculae (p < 0.001). Conclusions: Patients with type 1 HPS had poorer BCVA, increased incidence of esotropia, lighter iris and macular appearance. In contrast, patients with type 3 HPS had more exotropia. In addition, to our knowledge this is the largest series type 3 HPS ever reported.

PMID:
24766090
[PubMed - as supplied by publisher]
PMCID:
PMC4232478
[Available on 2015-10-28]
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