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Pulmonary Alveolar Proteinosis with Lung Lavage

Rare lung disease characterized by accumulation of surfactant-derived lipoproteinaceous material in alveoli due to impaired GM-CSF signaling, presenting with progressive dyspnea and characteristic crazy paving on HRCT; whole lung lavage remains the gold standard treatment with adjunctive inhaled GM-CSF therapy in autoimmune disease.

Written by: Saygı Hospital Health Guide Editorial Board
Last updated:

This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.

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This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Göğüs Hastalıkları department. Book Appointment →

What is Pulmonary Alveolar Proteinosis with Lung Lavage?

Pulmonary alveolar proteinosis is a rare lung disease (1-9 per million) caused by accumulation of surfactant-derived material (PAS-positive lipoproteinaceous) within alveoli due to defective surfactant clearance by alveolar macrophages. Three forms: autoimmune PAP (90%, GM-CSF autoantibodies disrupting macrophage function), secondary PAP (hematologic malignancies, dust exposure, immunodeficiency, infections), and hereditary PAP (CSF2RA/CSF2RB mutations affecting GM-CSF receptor).

Clinical presentation is variable: insidious progressive exertional dyspnea, dry cough, fatigue, weight loss, and digital clubbing in advanced cases. Some patients are asymptomatic with imaging findings. HRCT shows characteristic 'crazy paving' pattern (ground-glass opacities with superimposed septal thickening), often bat-wing distribution sparing lung apices and bases, with sharply demarcated geographical regions. BAL fluid is milky/opaque with PAS-positive staining and elevated turbidity.

Whole lung lavage (WLL) under general anesthesia with a double-lumen endotracheal tube remains the gold standard treatment for symptomatic PAP. The procedure involves filling one lung with warmed saline (15-30 L over 4-6 hours) while ventilating the other lung, with mechanical chest percussion to mobilize material; lavage is repeated 1-2 weeks later for the contralateral lung. Inhaled GM-CSF (sargramostim) shows promise for autoimmune PAP, with response rates 50-70%. Rituximab and plasmapheresis used for refractory autoimmune PAP. Avoid GM-CSF in secondary PAP.

Symptoms

Progressive exertional dyspnea (months-years)
Dry cough
Fatigue and decreased exercise tolerance
Weight loss
Digital clubbing in advanced disease
Hypoxemia, especially with exertion
Cyanosis in severe disease

Risk Factors

Cigarette smoking (autoimmune PAP)
Anti-GM-CSF autoantibodies (autoimmune form)
Dust exposure (silica, aluminum, fiberglass)
Hematologic malignancies (myelodysplastic syndrome, leukemia)
Immunodeficiency (HIV, primary immunodeficiency)
Lung infections (Nocardia, Mycobacterium, Aspergillus)
GM-CSF receptor gene mutations (hereditary PAP)

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • Progressive dyspnea over months
  • Persistent dry cough with fatigue
  • Hypoxemia on exertion
  • Crazy paving pattern on chest CT
  • PAP diagnosis requiring treatment
  • Worsening symptoms in known PAP
  • Suspected superimposed infection (Nocardia, Mycobacterium)

Treatment Methods

01
Whole lung lavage under general anesthesia (gold standard, 15-30 L saline)
02
Sequential bilateral WLL with 1-2 weeks between procedures
03
Inhaled GM-CSF (sargramostim) 250 mcg twice daily for autoimmune PAP
04
Rituximab for refractory autoimmune PAP
05
Plasmapheresis as adjunct for severe disease
06
Treatment of underlying cause in secondary PAP
07
Lung transplantation for end-stage disease

Which Department to Visit?

You can visit our Göğüs Hastalıkları department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

Learn About Göğüs Hastalıkları Department

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.