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Foundation Sciences · Genetics
Williams Syndrome
Williams syndrome (7q11.23 microdeletion) features a characteristic 'elfin' facies, supravalvular aortic stenosis, hypercalcaemia and a sociable 'cocktail party' personality.
📌 Learning Objectives
- Describe the underlying mechanism of Williams Syndrome.
- Identify the key clinical features and complications of Williams Syndrome.
- Outline the appropriate investigations and management of Williams Syndrome.
- Discuss the implications for patients and families of Williams Syndrome.
📋 Overview
Loss of the elastin gene (ELN) underlies the vascular features. Cognitive profile shows relative strengths in verbal and social skills but weakness in visuospatial processing.
🔬 Basic Science
Loss of the elastin gene (ELN) underlies the vascular features. Cognitive profile shows relative strengths in verbal and social skills but weakness in visuospatial processing.
🏥 Clinical Relevance
Hypercalcaemia may resolve spontaneously but requires dietary calcium and vitamin D restriction.
🧪 Investigations
Investigation depends on clinical context: relevant blood tests, imaging, and specific genetic or histopathological tests as appropriate. Refer to specialist services where indicated.
💊 Management
Management is condition-specific and typically multidisciplinary, combining medical therapy, surgical intervention where appropriate, supportive care, and family/genetic counselling.
Revision Resources – expand the sections below for high-yield notes, exam pearls, key facts and further reading.
MLA High-Yield Notes & Quick Revision ⌄
Common SBA themes: recognising the underlying mechanism, identifying classic clinical features, and choosing the first-line investigation or management step. Watch for inheritance pattern and characteristic associations.
williams
7q11.23
elastin
supravalvular aortic stenosis
- Williams syndrome: 7q11.23 microdeletion involving ELN (elastin).
- Supravalvular aortic stenosis is the most characteristic cardiac lesion.
- 'Cocktail party' personality with strong verbal skills but visuospatial deficits.
- Infantile hypercalcaemia requires dietary calcium/vitamin D restriction.
- Most cases are de novo.
Exam Pearls ⌄
⭐ High Yield
Williams syndrome: 7q11.23 microdeletion involving ELN (elastin).
Supravalvular aortic stenosis is the most characteristic cardiac lesion.
'Cocktail party' personality with strong verbal skills but visuospatial deficits.
Infantile hypercalcaemia requires dietary calcium/vitamin D restriction.
Most cases are de novo.
💡 Clinical Pearl
Williams: Hypercalcaemia may resolve spontaneously but requires dietary calcium and vitamin D restriction.
⚠️ Exam Tip — Common Mistakes
Confusing the mechanism of Williams Syndrome with related conditions.
Missing classic clinical features of Williams Syndrome in SBA stems.
Failing to consider Williams Syndrome in the differential diagnosis.
Key Facts ⌄
Williams syndrome: 7q11.23 microdeletion involving ELN (elastin).
Supravalvular aortic stenosis is the most characteristic cardiac lesion.
'Cocktail party' personality with strong verbal skills but visuospatial deficits.
Infantile hypercalcaemia requires dietary calcium/vitamin D restriction.
Most cases are de novo.
Related Topics ⌄
References ⌄
- GMC MLA Content Map
- NICE Clinical Knowledge Summaries
- BMJ Best Practice
Further Resources
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