Familial Pulmonary Fibrosis with a Non-UIP Fibrotic Pattern
Imaging findings
Serial CTs several years apart in a patient with known interstitial fibrosis show diffuse, bilateral reticulation with focal areas of dense peripheral upper lobe opacity containing traction bronchiectasis, relatively sparing the subpleural lower lung zones, and demonstrate clear interval worsening of fibrosis between the two studies -- a pattern atypical for usual interstitial pneumonia/IPF.
Key takeaways
A non-UIP pattern of progressive fibrosis, particularly with peripheral upper-lobe-predominant traction bronchiectasis, should prompt a family history inquiry -- this patient's mother and two siblings also had pulmonary fibrosis, supporting a diagnosis of familial pulmonary fibrosis, which classically shows more heterogeneous fibrotic patterns than sporadic IPF.
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