Danon Disease: Entire LAMP2 Gene Deletion with Unusual Clinical Presentation—Case Report and Review of the Literature

Adel Shalata, Marina Bar-Shai, Yarin Hadid, Muhammad Mahroum, Hila Mintz, Zaher Eldin Shalata, Evgeny Radzishevsky, Jacob Genizi, Avraham Lorber, Tamar Ben-Yosef, Liat Yaniv

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Danon disease is a rare x-linked dominant multisystemic disorder with a clinical triad of severe cardiomyopathy, skeletal myopathy, and intellectual disability. It is caused by defects in the lysosome-associated membrane protein-2 (LAMP2) gene. Numerous different mutations in the LAMP2 protein have been described. Danon disease is typically lethal by the mid-twenties in male patients due to cardiomyopathy and heart failure. Female patients usually present with milder and variable symptoms. This report describes a 42-year-old father and his 3-year-old daughter presenting with mild manifestations of the disease. The father has normal intellectual development and normal physical activity. At the age of 13, he was diagnosed with mild ventricular pre-excitation known as Wolf–Parkinson–White syndrome (WPWs), very mild and mostly asymptomatic cardiomyopathy and left ventricular hypertrophy, and at about the age of 25 presented with visual impairment due to cone–rod dystrophy. His daughter showed normal development and very mild asymptomatic electrocardiographic WPWs abnormalities with left mild ventricular hypertrophy. Genetic testing revealed an Xq24 microdeletion encompassing the entire LAMP2 gene. Relevant literature was reviewed as a reference for the etiology, diagnosis, treatment and case management.

Original languageEnglish
Article number1539
JournalGenes
Volume14
Issue number8
DOIs
StatePublished - 27 Jul 2023
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2023 by the authors.

Keywords

  • Danon disease
  • LAMP2-gene
  • genotype-phenotype correlation
  • microdeletion
  • penetrance
  • whole-exome-sequence

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