What is Williams-Campbell syndrome?
Williams-Campbell syndrome is an ultra-rare condition in which the cartilage that normally supports the medium-sized airways is missing or deficient. Cartilage rings keep the bronchi open. Without them, the affected bronchi balloon out when breathing in and collapse when breathing out.
The defect typically affects the fourth to sixth generations of bronchi (the airways a few branches beyond the main bronchi) in both lungs. Over time these weak airways become permanently widened and filled with mucus, producing a distinctive pattern of cystic bronchiectasis in the middle portions of the lungs.
The condition is usually thought to be congenital and most often presents in childhood, although milder cases may not be diagnosed until adult life. Children are managed jointly with paediatric pulmonology.
Symptoms
Symptoms reflect poor clearance of mucus and recurrent infection:
- Persistent wet cough with daily sputum
- Recurrent chest infections and pneumonia from early childhood
- Wheeze, often initially treated as asthma
- Breathlessness, especially on exertion
- Finger clubbing in long-standing disease
- Poor growth in children with frequent infections
In adults diagnosed later, the history often includes many years of cough and repeated antibiotic courses.
Causes
The underlying reason the cartilage fails to develop is not known. Most cases appear to be present from birth, and a few families with more than one affected member have been reported, suggesting a genetic contribution in some. It has also been debated whether some cases result from cartilage damage after severe early childhood infections. The condition is not contagious, and it is not caused by anything the parents did.
How Williams-Campbell syndrome is diagnosed
Diagnosis is based on the typical CT appearance, after other causes of bronchiectasis have been excluded.
| Test | What it shows |
|---|---|
| CT chest in breath-in and breath-out | Cystic bronchiectasis beyond the main bronchi, with ballooning on breathing in and collapse on breathing out, while the trachea and main bronchi are normal |
| Lung function tests | Airflow obstruction, often with air trapping |
| Sputum culture | Bacteria such as Haemophilus or Pseudomonas, and mycobacteria |
| Sweat test or CFTR gene testing | Exclusion of cystic fibrosis |
| Nasal nitric oxide, ciliary studies or genetic tests | Exclusion of primary ciliary dyskinesia |
| Immunoglobulins, total IgE and Aspergillus tests | Immune deficiency or allergic bronchopulmonary aspergillosis |
| Bronchoscopy | Airway collapse and samples for culture where needed |
Conditions to distinguish include cystic fibrosis, primary ciliary dyskinesia, ABPA, immune deficiency, Mounier-Kuhn syndrome and bronchiectasis following tuberculosis, which is common in India.
Treatment
There is no treatment that replaces the missing cartilage. Management follows established bronchiectasis principles and aims to keep the airways clear, prevent infection and protect lung function.
Airway clearance
Daily chest physiotherapy is the cornerstone of treatment. Techniques are taught by a respiratory physiotherapist and adapted to the child's age, for example breathing exercises, positive expiratory pressure devices, and active play and exercise. Nebulised saline can help loosen sputum.
Preventing and treating infection
- Early antibiotic treatment of exacerbations, guided by sputum results
- Long-term macrolide or inhaled antibiotic treatment for frequent exacerbations
- Routine childhood immunisations plus influenza and pneumococcal vaccines
- A smoke-free home and avoidance of smoking
Other treatments
Bronchodilator inhalers may help those with wheeze. Good nutrition supports growth in children. Surgery is rarely helpful because the disease affects both lungs widely. Lung transplantation is considered for advanced disease and is coordinated with transplant centres.
Outlook and follow-up
The outlook varies from mild disease compatible with normal adult life to progressive lung damage. Regular clinic review with sputum surveillance, lung function testing and growth monitoring in children helps detect infection and decline early. As children grow up, care is transferred in a planned way from paediatric to adult services.
Families are encouraged to learn the airway clearance routine alongside the child, so that physiotherapy becomes a normal part of the day. Schools can be given a short written plan explaining the condition, the need for prompt treatment of chest infections, and when to contact the family or the clinic.
When to seek urgent care
Seek urgent medical help for breathlessness at rest, blue lips, high fever with worsening cough and sputum, coughing up blood, or a child who is drowsy, not feeding or breathing very fast.
Frequently asked questions
How is Williams-Campbell syndrome different from Mounier-Kuhn syndrome?
Mounier-Kuhn syndrome affects the trachea and main bronchi, which become abnormally wide. In Williams-Campbell syndrome, the trachea and main bronchi are normal and the defect lies in the cartilage of the smaller bronchi further down.
Is Williams-Campbell syndrome inherited?
Most cases occur in families with no other affected members. A few families with more than one affected person have been described, so a genetic contribution is possible in some.
Can my child lead a normal life?
Many children attend school, play sport and grow normally with good airway clearance and early treatment of infections. Severity varies, so the care plan is tailored to each child.
Why are other tests needed if the CT is typical?
Conditions such as cystic fibrosis, primary ciliary dyskinesia and immune deficiency can also cause bronchiectasis and have specific treatments, so they need to be excluded.
Is surgery an option?
Surgery is rarely useful because both lungs are usually widely affected. Lung transplantation may be considered in advanced disease.
Related conditions and procedures
Consult Dr. Gogineni Ratnakara Rao
Apollo Hospitals, Financial District: Monday to Saturday, 8:30 AM to 5:00 PM. Anything in Lung Clinic, Chanda Nagar: Monday to Saturday (Thursday closed), 6:00 PM to 9:00 PM.