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Sly Disease: Mucopolysaccharidosis Type VII
Sheela Nampoothiri1, Mahesh Kappanayil, K R Hiran
1Department of Pediatric Genetics,Pediatric Cardiology, and Pathology, Amrita Institute of Medical Sciences and Research Center, Elamakkara PO, Cochin 682 026,Kerala, India. sheelaknpn@yahoo.co.in
Indian Pediatrics
|October 25, 2008
Summary
Sly disease, a rare genetic disorder, was diagnosed in an infant with severe heart issues and organ enlargement. This marks the first reported case of Mucopolysaccharidosis VII in India, highlighting a critical need for awareness.
Area of Science:
- Biochemistry
- Genetics
- Pediatrics
Background:
- Mucopolysaccharidoses (MPS) are a group of rare genetic disorders caused by deficiencies in enzymes responsible for breaking down complex sugar molecules.
- Sly disease, also known as MPS VII, is characterized by a deficiency in the enzyme beta-glucuronidase.
- Early diagnosis and management are crucial for improving outcomes in infants with MPS.
Observation:
- A 6-month-old infant presented with severe mitral regurgitation, a significant heart valve defect.
- Clinical examination revealed hepatosplenomegaly (enlarged liver and spleen) and corneal clouding, characteristic of lysosomal storage disorders.
- Leukocyte analysis identified Alder-Reilly granules, a distinctive feature in certain MPS types.
Findings:
- Biochemical analysis confirmed extremely low levels of beta-glucuronidase activity.
- These findings led to the definitive diagnosis of Sly disease (Mucopolysaccharidosis VII).
- This case represents the first documented instance of MPS VII diagnosed in India.
Implications:
- This diagnosis in an Indian infant underscores the global prevalence of Sly disease.
- Increased awareness and diagnostic capabilities for MPS VII are needed in India.
- Further research into the genetic and clinical spectrum of MPS VII in diverse populations is warranted.
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