CTICasesChronic Hypersensitivity Pneumonitis (Chicken Sexer's Lung)
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Imaging findings
Chest CT demonstrates severe, upper-lung predominant pulmonary fibrosis characterized by traction bronchiectasis, bronchiolectasis, and associated ground-glass opacities.
Key takeaways
Hypersensitivity pneumonitis (HP) is an immunologically mediated disease triggered by inhaled antigens, such as those encountered in poultry factories by 'chicken sexers'. Chronic HP can closely mimic a usual interstitial pneumonia (UIP) pattern, but typically features an upper- or mid-lung predominance and sparing of the extreme bases.
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