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Tree-in-Bud Sign on Chest CT • Multiple centrilobular nodules arranged in a linear branching pattern. • DDx: NTM, atypical pna, Viral bronchiolitis, aspiration pneumonitis https://doi.org/10.1016/j.chest.201 #TreeInBud #Sign #CT #Lung #Pulmonary #diagnosis #radiology #clinical #tree #bud