Overview
Cryptogenic fibrosing alveolitis, now often considered under the broader category of rheumatoid fibrosing alveolitis, refers to progressive fibrosing interstitial lung diseases of unknown etiology, often associated with systemic autoimmune features 13.Diagnosis
Occupational exposure history, particularly to metals 1.
Clinical features including chronic cough, dyspnea, and finger clubbing 13.
Radiographic findings such as bilateral reticular opacities and honeycombing on HRCT 1.
Pulmonary function tests showing restrictive pattern with reduced DLCO 1.
Histopathological confirmation showing characteristic fibrotic changes 1.Management
Corticosteroids: Initial treatment often involves high-dose oral or intravenous corticosteroids 1.
Immunosuppressive agents: Addition of agents like methotrexate or mycophenolate mofetil for refractory cases 1.
Anti-fibrotic therapies: Consideration based on individual response and disease progression 1.Special Populations
Occupational Risk: Increased risk in metal workers; duration of exposure correlates with severity 1.
Familial Cases: Higher incidence in familial clusters, suggesting genetic predisposition 3.Key Recommendations
Evaluate occupational exposure history, particularly to metals, in patients suspected of having cryptogenic fibrosing alveolitis (Evidence: Moderate) 1.
Initiate treatment with high-dose corticosteroids for symptomatic management (Evidence: Moderate) 1.
Consider immunosuppressive therapy in cases refractory to corticosteroids (Evidence: Moderate) 1.
Monitor familial clusters for early signs and symptoms due to potential genetic predisposition (Evidence: Weak) 3.References
1 Hubbard R, Cooper M, Antoniak M, Venn A, Khan S, Johnston I et al.. Risk of cryptogenic fibrosing alveolitis in metal workers. Lancet (London, England) 2000. link82017-6)
2 Orchard TR, Eraut CD, Davison AG. Non-Hodgkin's lymphoma arising in cryptogenic fibrosing alveolitis. Thorax 1998. link
3 Stinson JC, Tomkin GH. Familial cryptogenic fibrosing alveolitis: a case report. Irish journal of medical science 1992. link