HRCT: ground glass opacity ?
hypersensitivity pneumonitis, all acute interstitial disease (IPF, viral), PCP, BOOP, eosinophilic PNA, pulmonary edema, alveolar proteinosis;
HRCT: nodular ?
hematogenous infection or mets, sarcoid, pneumoconiosis (silicosis, CWP), EG;
HRCT: reticulonodular ?
pulmonary edema, viral, mycoplasma, PCP, lymphangitic spread, pulmonary fibrosis (IPF, drugs, radiation, CVD), asbestosis;
HRCT: cystic ?
LAM, cystic PCP, EG, honeycombing (IPF, any end-stage ILD);
HRCT: interlobular septal thickening ?
CHF, lymphangitic spread, alveolar proteinosis, sarcoid;
HRCT: centrilobular nodules ?
endobronchial spread of infection or tumor (TB, MAI, bronchoPNA), airways diseases (CF, bronchiectasis, TB, MAI), hypersensitivity pneumonitis, silicosis, histiocytosis, BOOP, pulmonary edema, talc;
HRCT: tree-in-bud ?
endobronchial spread of infection, airways diseases;
HRCT: perilymphatic nodules ?
sarcoid, silicosis, lymphangitic spread;
HRCT: diffuse random nodules ?
miliary TB, fungus, mets