Marfan syndrome
Marfan syndrome is a genetic condition that affects the body’s connective tissue, which provides strength and elasticity to structures such as the heart, blood vessels, eyes, and bones.
It is caused by a mutation in the FBN1 gene on chromosome 15, which affects the production of fibrillin-1, an important structural protein.
🧬 Genetic Cause
- Mutation in the FBN1 gene
- Leads to weak connective tissue
- Causes increased activity of TGF-β (transforming growth factor beta)
- This weakens the body’s structural “support system”
🧬 Inheritance Pattern
Marfan syndrome follows an autosomal dominant pattern:
- 75% inherited from a parent with the condition
- 25% spontaneous (de novo) mutation
👉 A child has a 50% chance of inheriting it if one parent is affected.
🕒 When It Happens
The genetic change is present:
- Before birth (from conception)
- But effects can become more serious over time due to body stress and growth
🤰 Before Pregnancy (Preconception)
- Risk assessment of the aorta (especially aortic root size)
- A diameter over 4.0 cm increases risk
- Genetic counselling offered (50% inheritance risk)
- IVF with genetic screening may be discussed
- Some medications (ACE inhibitors / ARBs) may need to be stopped
🤰 During Pregnancy
- Regular heart monitoring (echocardiograms every 4–12 weeks)
- Increased blood volume increases stress on the aorta
- Risk of aortic dissection (life-threatening tear)
- Beta-blockers often used to reduce heart strain
👶 During Birth
- Vaginal delivery may be possible if aorta is stable (<4.0 cm)
- C-section recommended if aorta is enlarged (>4.0–4.5 cm)
- Epidural often used to reduce blood pressure spikes
- Careful monitoring for spinal complications (dural ectasia)
🏥 After Birth (Postpartum)
- Highest risk period for aortic dissection (3–6 months)
- Ongoing cardiovascular monitoring is essential
- Increased risk of postpartum bleeding
-
Babies may be:
- Premature
- Small for gestational age
🧠 Key Idea
Marfan syndrome is a lifelong genetic condition that affects connective tissue strength, especially in the heart and blood vessels.
💡 Important Message
- It is genetic and not caused by lifestyle
- It can be inherited or occur randomly
- Careful monitoring greatly improves outcomes
🧩 2. EASY READ VERSION (SIMPLE LANGUAGE)
🧬 Marfan Syndrome
- Marfan syndrome is a genetic condition
- People are born with it
🧬 What causes it
- A change in the FBN1 gene
- It affects body tissues
- These tissues become weak
❗ Important
- It is not anyone’s fault
- It can run in families
- Or happen by chance
🤰 Pregnancy and birth
People with Marfan syndrome need extra care:
Before pregnancy
- Doctors check the heart
- They give advice about risk
During pregnancy
- Heart is checked often
- Extra stress on the body
During birth
- Some people can have natural birth
- Some need a C-section
After birth
- Extra heart risk for months
- Needs close medical care
🧠 Key message
- It is lifelong
- It affects strength of the body
- Support and monitoring are very important
📊 3. TABLE SUMMARY VERSION
| Feature | Information |
|---|---|
| Condition | Marfan syndrome |
| Gene affected | FBN1 (chromosome 15) |
| Protein affected | Fibrillin-1 |
| Cause | Genetic mutation (inherited or de novo) |
| Inheritance | Autosomal dominant |
| Risk | 50% if parent affected |
| Main system affected | Heart, blood vessels, eyes, bones |
| Pregnancy risk | High cardiovascular stress |
| Key complication | Aortic dissection |
| Lifelong? | Yes |
🧠 4. POWERPOINT SLIDES VERSION
Slide 1 – Title
Marfan Syndrome
Slide 2 – What it is
- Genetic connective tissue disorder
- Affects strength of body structures
- Present from birth
Slide 3 – Cause
- FBN1 gene mutation
- Weak fibrillin-1 protein
- Affects connective tissue
Slide 4 – Inheritance
- Autosomal dominant
- 50% chance if parent affected
- Can also happen randomly
Slide 5 – Pregnancy (before birth)
- Heart and aorta monitored
- Genetic counselling offered
Slide 6 – During pregnancy
- Increased strain on heart
- Regular echocardiograms
- Medication management
Slide 7 – Birth and after
- Vaginal or C-section depending on risk
- Highest risk postpartum period
- Needs close monitoring
Slide 8 – Key message
- Lifelong condition
- Affects connective tissue
- Care improves safety and outcomes
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