Unformatted text preview: nearby nodules--satellite. In sarcoidosis, galaxy sign is a larger nodule with nearby grouped smaller nodules
Benign pulmonary (granuloma), Central "bullseye" (histoplasmosis), Popcorn (hamartoma), Concentric "target" (histoplasmosis).
Diffuse nodule calcification patterns?
Benign pulmonary nodule>doubling times?
< 1 month, or 16 months.
What increase in diameter equalsto 12.6 mm)of volume?
26% increase (10 mm a doubling
Differential, multiple large pulmonary Bronchogenic carcinoma Bacterial, fungal, and sometimes viral infections Granulomatous disease Sarcoidosis Wegener's granulomatosis Rheumatoid lung Amyloidosis Septic emboli
Metastases Lymphoma nodules?
PulmonaryTypically round and well-defined. Cavitation and calcification can be seen.
Signet ringBronchiectasis. Cross section of pulmonary artery branch adjacent to dilated, ring-shaped bronchus.Bronchus diameter exceeds adjacent artery's
Bronchiectasis patterns upper lobes, most severe at parahilar lungs. ABPA-central bronchiectasis.
CF-bilateral, in cystic fibrosis and allergic bronchopulmonary aspergillosis?
Causes of interlobular septal thickening as predominant finding at HRCT?
1. Lymphatic spread of carcinoma. 2. Interstitial pulmonary edema. 3. Alveolar proteinosis. 4. Sarcoidosis.
Common causes of fibrosis and honeycombing as predominant HRCT findings? fibrosis, Asbestosis, End-stage hypersensitivity pneumonitis, End-stage sarcoidosis.
IPF 65%, Collage vascular diseases (RA, scleroderma), Drug-related
3 distributions of pulmonary nodules at HRCT?
Perilymphatic nodules (pleural surface, large vessels and bronchi, interlobular septa, centrilobular regions), Random nodules (miliary TB, hematogenous metastases), Centrilobular nodules (tree-in-bud--endobronchial TB, MAC/MAI, CF, bronchiectasis, bronchopneumonia).
CT features of pulmonary lymphangitic spread of carcinoma?
Interlobular septal thickening, Peribronchial interstitial thickening, Thickening of fissures, Lymph node enlargement, Patchy distribution.
CT features of pulmonary hematogenous spread of tumor?
Random distribution, Fissures and pleural surface involvement, Bilateral, Large nodules.
CT features of IPF (idiopathic pulmonary fibrosis--UIP is histology pattern)?
Intralobular interstitial thickening, Honeycombing, Traction bronchiectasis and bronchiolectasis, Subpleural, posterior, and basal lungs, Ground-glass opacity.
Nonspecific interstitial pneumonia Posterior basalvascular disease) CT features?
Ground-glass opacity, (NIP, collagen lungs-sparing immediate subpleural lung, Reticulation, traction bronchiectasis and bronchiolectasis, Honeycombing-rare.
Active sarcoidosis CT features?
Perilymphatic nodules, Patchy, upper lobe predominance, Hilar, mediastinal node enlargement, Ground-glass opacity (small granulomas).
HRCT findings in end-stage sarcoidosis?
Irregular septal thickening, Architectural distortion, Parahilar conglomerate masses, Honeycombing, Hilar and mediastinal node enlargement.
PulmonaryInterlobular septal thickening, Peribronchial interstitial thickening Patchy or unilteral distribution Lymph node enlargement.
lymphangitic spread of carcinoma?
PulmonaryRandom distribution, Involvement of fissures and pleural surfaces, Bilateral distribution, Large nodules.
hematogenous spread of tumor?
Idiopathic pulmonary fibrosis CT features?
Intralobular thickening, Honeycombing, Traction bronchiectasis and bronchiolectasis, Predominant subpleural,...
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- Winter '14
- Radiology, Metastasis