This is a 47 year old male with progressive exertional dyspnoea - over 1 year. He had moderate restriction on spirometry and Baseline SaO2 of 92 uio% o room air.There is no clubbing.What is this pattern ? what is the DD ? How will you confirm the diagnosis?
Answer - Mosaic pattern. DD for this ranges from hypersensitivity pneumonia to alveolar proteinosis to IPF. Lung biopsy is the method to confirm the diagnosis.
Incidentally this was usual interstitial pneumonia (UIP-IPF) on histopathology.
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