Journal
ACTA OPHTHALMOLOGICA
Volume 99, Issue 1, Pages 61-68Publisher
WILEY
DOI: 10.1111/aos.14478
Keywords
autofluorescence; Danon disease; LAMP2; pigmentary retinopathy; somatic mosaicism; spectral-domain optical coherence tomography
Categories
Funding
- UNCE research program of the Charles University [204064]
- PROGRES Q26/LF1 research program of the Charles University
- General University Hospital in Prague [RVO-VFN 64165/2012]
- National Institute for Health Research Biomedical Research Centre at Moorfields Eye Hospital National Health Service Foundation Trust
- UCL Institute of Ophthalmology
- [AZV-MZ 15-27682A]
- [NU20-07-00182]
- [NV19-08-00122]
- [SVV UK 260516]
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DD patients with advanced cardiomyopathy showed pigmentary retinopathy, visual field loss, and altered autofluorescence. Retinal pathology severity increased with age, with marked cone-rod involvement over time. Detailed ocular examination can be a sensitive screening tool for identifying carriers ofLAMP2pathogenic variants.
Purpose Danon disease (DD) is a rare X-linked disorder caused by pathogenic variants inLAMP2. DD primarily manifests as a severe cardiomyopathy. An early diagnosis is crucial for patient survival. The aim of the study was to determine the usefulness of ocular examination for identification of DD. Methods Detailed ocular examination in 10 patients with DD (3 males, 7 females) and a 45-year-old asymptomatic female somatic mosaic carrier of aLAMP2disease-causing variant. Results All patients with manifest cardiomyopathy had pigmentary retinopathy with altered autofluorescence and diffuse visual field loss. Best corrected visual acuity (BCVA) was decreased (<0.63) in 8 (40%) out of 20 eyes. The severity of retinal pathology increased with age, resulting in marked cone-rod involvement overtime. Spectral-domain optical coherence tomography in younger patients revealed focal loss of photoreceptors, disruption and deposition at the retinal pigment epithelium/Bruch's membrane layer (corresponding to areas of marked increased autofluorescence), and hyperreflective foci in the outer nuclear layer. Cystoid macular oedema was seen in one eye. In the asymptomatic female with somatic mosaicism, the BCVA was 1.0 bilaterally. An abnormal autofluorescence pattern in the left eye was present; while full-field electroretinography was normal. Conclusions Detailed ocular examination may represent a sensitive and quick screening tool for the identification of carriers ofLAMP2pathogenic variants, even in somatic mosaicism. Hence, further investigation should be undertaken in all patients with pigmentary retinal dystrophy as it may be a sign of a life-threatening disease.
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