CTICasesFibrotic Hypersensitivity Pneumonitis
Imaging findings
Chest radiograph shows reticulation in the peripheral lungs. High-resolution chest CT shows subpleural reticulation, predominantly in the lower lungs but also involving the upper lung zones, with ground-glass opacity in the central lung and subtle mosaic attenuation/air trapping on expiration. Surgical pathology demonstrates chronic interstitial inflammation, focal NSIP-like fibrosis, and numerous non-necrotizing granulomas with giant cells.
Key takeaways
Fibrotic hypersensitivity pneumonitis can mimic idiopathic pulmonary fibrosis (IPF/UIP) or non-specific interstitial pneumonia (NSIP) on imaging. The presence of subtle lobular air trapping on expiration, central ground glass, and the pathologic finding of interstitial granulomas or giant cells point toward chronic HP.
AI-assisted summary — may contain errors. Verify against the source video. Learn more
More from this webinar
- Disseminated Strongyloides InfectionInfection
- Posterior Mediastinal Bronchogenic CystCongenital
- Double Aortic Arch with Left Arch DominanceCongenital
- Anterior Mediastinal HemangiomaNeoplastic
- Chronic Hypersensitivity Pneumonitis (Byssinosis)ILD
- Multifocal Cystic Fibrohistiocytic Tumor of the LungNeoplastic
- Delayed Traumatic Diaphragmatic HerniaTrauma
- Pulmonary Langerhans Cell Histiocytosis (PLCH)ILD
See all cases from March 4, 2022 →