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Cardiovascular pathologies in mucopolysaccharidosis type VII (Sly Syndrome)
Thomas J Gniadek1, Nicole Singer1, Norman J Barker1
1Department of Pathology, Johns Hopkins Hospital, Baltimore, MD 21205, USA.
Summary
Sudden cardiac death in a 28-year-old male with mucopolysaccharidosis VII (MPS VII) revealed significant cardiac pathology. Autopsy showed aortic valve stenosis, intimal thickening, and left ventricular hypertrophy, highlighting cardiac complications of Sly Syndrome.
Area of Science:
- Cardiovascular Pathology
- Rare Genetic Disorders
- Autopsy Studies
Background:
- Mucopolysaccharidosis VII (MPS VII), or Sly Syndrome, is a rare lysosomal storage disorder.
- Cardiac involvement is a known but often under-recognized complication of MPS VII.
- This case highlights the severe cardiac manifestations in an adult patient.
Observation:
- Autopsy of a 28-year-old male with biochemically confirmed MPS VII who experienced sudden cardiac death.
- Detailed examination revealed thickened, stenotic aortic valve leaflets and marked concentric intimal thickening of the aorta and muscular arteries.
- Additional findings included left ventricular hypertrophy, papillary muscle thickening/fusion, and colloid iron deposition in cardiac arteries and intercalated discs.
Findings:
- The autopsy findings indicate severe cardiovascular disease attributable to MPS VII.
- Specific pathologies included aortic valve disease, arterial wall thickening, and myocardial hypertrophy.
- Histological analysis revealed colloid iron accumulation, a potential marker of cellular damage in MPS VII.
Implications:
- This case underscores the critical need for cardiac monitoring in patients with MPS VII.
- Understanding these cardiac pathologies can inform clinical management and prognosis for Sly Syndrome.
- Further research into the mechanisms of cardiac involvement in MPS VII is warranted.
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