Chest Radiology Signs:
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Many of the signs are not specific. Please click on the signs for other differentials.
Signs in chest imaging Diagn Interv Radiol 2011
Radiologic Signs in Thoracic Imaging AJR 2009
Signs in Thoracic Imaging Journal of Thoracic Imaging 2006
Air Crescent Sign – Invasive aspergillosis
Atoll sign ( Reversed halo sign) – Cryptogenic organizing pneumonia
Black Pleural Line Sign – Pulmonary Alveolar Microlithiasis
Button Sequestrum Sign – Eosinophilic granuloma
Bulging Fissure sign – Klebsiella pneumoniae pneumonia
Cervicothoracic sign – Evaluate mediastinal location
Comet Tail Sign – Round atelectasis
Continuous diaphragm sign – Pneumomediastinum vs pneumothorax
Crazy-paving Sign – Pulmonary alveolar proteinosis
CT Angiogram Sign – Bronchoalveolar cell carcinoma
Deep Sulcus Sign- Pneumothorax
Double density sign – Left atrial enlargement
Extrapleural Fat Sign – Extrapleural hematoma
Fissure Sign – Pleural effusion
Football Sign – Massive pneumoperitoneum
Gloved Finger Sign – Allergic bronchopulmonary aspergillosis
Golden S Sign – Right upper lobe collapse
Hampton Hump – Pulmonary infarct
Halo Sign- Invasive pulmonary aspergillosis
Headcheese Sign – Hypersensitive Pneumonitis
Hilum overlay sign – to identify mediastinal location of mass
Incomplete Border Sign – Extrapulmonary Lesions
Juxtaphrenic peak sign – Upper lobe collapse
Luftsichel sign – Left upper lobe collapse
Midsternal Stripe Sign – Sternal Dehiscence
Naclerio’s V Sign – Pneumomediastinum
Pleural Sandwich Sign – Lymphoma
Positive bronchus sign – Bronchogenic carcinoma
Reversed halo sign (Atoll sign) – Cryptogenic organizing pneumonia
Ring-around-the-Artery Sign – Pneumomediastinum
Sandstorm-like appearance – Pulmonary Alveolar Microlithiasis
Scimitar Sign – Partial anomalous pulmonary venous return
Signet Ring Sign – Bronchiectasis
Subpleural Sparing sign – Pulmonary contusion
Tree in bud sign – Mycobacterium tuberculosis
Water Lily sign – Hydatid cyst (also for other hydatid cyst signs)
Westermark sign – Pulmonary embolism