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Infant case of lysosomal acid lipase deficiency: Wolman's disease
Meghmala Sadhukhan1, Amit Saha2, Roshni Vara3
1Maidstone & Tunbridge Wells NHS Trust, Pembury, UK.
Insights
Lysosomal acid lipase (LAL) deficiency, a rare genetic disorder, can cause severe infant illness. Early diagnosis in infants with failure to thrive and gastrointestinal issues is crucial for timely LAL replacement therapy.
Area of Science:
- Biochemistry
- Genetics
- Pediatrics
Background:
- Lysosomal acid lipase (LAL) deficiency is an inherited metabolic disorder.
- It results from mutations in the LIPA gene, affecting lipid metabolism.
- LAL deficiency leads to intracellular accumulation of cholesteryl esters and triglycerides.
Observation:
- A case of an infant with Wolman's disease, a severe form of LAL deficiency, is presented.
- The infant exhibited symptoms including vomiting, diarrhea, hepatosplenomegaly, and poor weight gain.
- Adrenal calcification, a characteristic feature, was noted.
Findings:
- The infant was diagnosed with early-onset LAL deficiency (Wolman's disease).
- The patient was enrolled in a clinical trial for LAL replacement therapy.
- This case highlights the importance of considering LAL deficiency in infants with specific clinical signs.
Implications:
- Early identification of LAL deficiency is critical for initiating timely treatment.
- LAL replacement therapy offers a potential therapeutic option for affected infants.
- This case underscores the need for increased awareness among clinicians regarding rare metabolic disorders.
Abstract:
Lysosomal acid lipase (LAL) deficiency is a rare autosomal recessive disorder which causes two distinct clinical phenotypes: Wolman's disease and cholesterol ester storage disease. LAL hydrolyses LDL-derived triglycerides and cholesterol esters to glycerol or cholesterol and free fatty acids. Its deficiency leads to accumulation of intracellular triglycerides and/or cholesterol esters. In early onset LAL deficiency, clinical manifestations start in the first few weeks of life with persistent vomiting, failure to thrive, hepatosplenomegaly, liver dysfunction and hepatic failure. Adrenal calcification is a striking feature but is present in only about 50% of cases. We report a case of an infant presenting with vomiting, diarrhoea, hepatosplenomegaly and poor weight gain that was subsequently diagnosed as Wolman's disease. He was entered into a clinical trial for LAL replacement therapy. This case reinforces that early onset LAL deficiency should be considered in a baby presenting with failure to thrive, gastrointestinal symptoms and hepatosplenomegaly.
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