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Chest signs

Air Bronchogram Sign

Visible bronchi within parenchymal consolidation: Atelectasis, Pneumonia, Edema, Hemorrhage, Bronchogenic carcinoma, Eosinophilic pneumonia, Alveolar proteinosis

Air Crescent Sign

Lesion in preexisting cavity, Aspergilloma

Apical Cap

Pancoast tu

Aortic Nipple

Left Superior Intercostal Vein

Bat-Wing Sign

Pulmonary edema, P. hemorrhage, PCP pneumonia, Inhalation injury

Bowing Fissure Sign

Atelectasis, Bronchogenic Carcinoma

Bulging Fissure Sign

Klebsiella pneumonia aka Friedlander pneumonia

Cervicothoracic sign

Comet-tail Sign

Rounded Atelectasis

Continuous Diaphragm Sign

Pneumomediastinum, Pneumopericardium

CT Angiogram Sign

enhancing vessels, Bronchogenic Carcinoma, PNA, Lymphoma

Deep Sulcus Sign

PMX on supine view

Double-lesion Sign:

atelectasis of 2 segments not supplied by one bronchus ie Right Upper and Middle Lobes suggestive of BENIGN lesion as tumor usually obstructs one bronchus and causing atelectasis distal to the obstruction; bronchus intermedius supply RML and RLL (so atelectasis of RML and RLL is suggestive of obstructed bronchus intermedius by tumor [or intubation into b.intermedius]); Lingula and LLL shares same bronchus

Enlarged cardiac silhouette

pericardial effusion, CHF, cardiomyopathy

Fallen lung sign

lung collapse with fractured bronchus

Flat Waist Sign

flattening (straightening) of the L heart border with LLL atelectasis

Fleeting opacities

Eosinophilic PNM

Finger-In-Glove Sign

bronchiectasis filled with mucus, ABPA (Aspergillus), Cystic Fibrosis, mucus plugged bronchi distal to tumor obstruction, clustered-grape appearance

Golden’s S Sign

elevation of the lateral aspect of the minor fissure due to RUL atelectasis and downward convexity of the medial aspect due to hilar mass - Lung cancer

Hilum overlay Sign

Anterior or Posterior mediastinal mass

Halo Sign

Hemorrhage around nodule, Leukemia - invasive Aspergillosis - GGO

Hampton Hump Sign

infarction from PE, peripheral opacification, has to contact pleural surface, often rounded

Juxtaphrenic peak sign

middle hemidiaphragm pointing up, upper lobe atelectasis

Kerley B lines

interlobular septal thickening, edema, fibrosis, infiltration

Luftsichel sign

a sickle like lucency around aortic arch w/ LUL atelectasis. Upper segment of LLL becomes hyperareated - around aortic arch. Suggest bronchogenic carcinoma in adults

Melting Ice Cube Sign

Resolving pulmonary infarct

Mogul sign

Aortic Coarctation

Oreo cookie sign

black in the middle, pericardial effusion

Reverse Bat-Wing Sign

Eosinophilic Pneumonia, Cryptogenic Organizing PNM, Sarcoid, Rad. Pneumonitis, Lung Contusion, Bronchogenic Carcinoma

Ring around the artery


Silhouette sign

Spine sign

LLL consolidation, mass, too white

Split pleura sign

enhancing pleura, empyema

Thoracoabdominal sign

mass located in posterior mediastinum

Water bottle heart

Pericardial effusion

Westermark sign

oligemia behind occluded vessel with PE