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Sail sign of the chest

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Medical condition

Sail sign of the chest
Differential diagnosis	left lower lobe collapse

On a chest X-ray, the sail sign is a radiologic sign that suggests left lower lobe collapse. In children, however, a sail sign could be normal, reflecting the shadow of the thymus.

The thymic sail sign or spinnaker-sail sign is due to elevation of the thymic lobes in the setting of pneumomediastinum.

References

Bejvan S, Godwin J (1996). "Pneumomediastinum: old signs and new signs". AJR Am J Roentgenol. 166 (5): 1041–8. doi:10.2214/ajr.166.5.8615238. PMID 8615238.
"THYMIC SAIL SIGN". www.mypacs.net.
"Pneumomediastinum Revisited" July 2000 RadioGraphics, 20, 1043-1057

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Diseases of the respiratory system

Upper RT
(including URTIs,
common cold)

sinuses: Sinusitis

Vasomotor rhinitis

Atrophic rhinitis

nasal septum

Nasal septum deviation

Nasal septum perforation

Nasal septal hematoma

tonsil: Tonsillitis; Adenoid hypertrophy; Peritonsillar abscess

Laryngopharyngeal reflux (LPR)

Retropharyngeal abscess

larynx: Croup; Laryngomalacia; Laryngeal cyst; Laryngitis; Laryngopharyngeal reflux (LPR); Laryngospasm

vocal cords: Laryngopharyngeal reflux (LPR); Vocal fold nodule; Vocal fold paresis; Vocal cord dysfunction

epiglottis: Epiglottitis

trachea: Tracheitis; Laryngotracheal stenosis

Lower RT/
lung disease
(including LRTIs)

Bronchial/
obstructive

acute: Acute bronchitis

chronic

Chronic bronchitis

Acute exacerbation of COPD)

Asthma (Status asthmaticus

Exercise-induced

Cystic fibrosis

unspecified

Bronchiolitis obliterans

Diffuse panbronchiolitis

Interstitial/
restrictive
(fibrosis)

External agents/
occupational
lung disease

Bauxite fibrosis

Caplan's syndrome

Coalworker's pneumoconiosis

Hypersensitivity pneumonitis

Bird fancier's lung

Other

Obstructive /
Restrictive

Pneumonia/
pneumonitis

By pathogen	Viral Bacterial Pneumococcal Klebsiella Atypical bacterial Mycoplasma Legionnaires' disease Chlamydiae Fungal Pneumocystis Parasitic noninfectious Chemical/Mendelson's syndrome Aspiration/Lipid
By vector/route	Community-acquired Healthcare-associated Hospital-acquired
By distribution	Broncho- Lobar
IIP	UIP DIP BOOP-COP NSIP RB

Other

Atelectasis
circulatory
- Pulmonary hypertension
- Pulmonary embolism
Lung abscess

Pleural cavity/
mediastinum

Pleural disease

Pleuritis/pleurisy

Pneumothorax/Hemopneumothorax

Pleural effusion: Hemothorax; Hydrothorax; Chylothorax; Empyema/pyothorax; Malignant

Mediastinal disease

Other/general

v t e Radiologic signs
Cardiovascular	Aortic unfolding Dense artery sign Halo sign
Respiratory	Air crescent sign Deep sulcus sign Golden S sign Hampton hump Kerley lines Peribronchial cuffing Sail sign of the chest Silhouette sign Steeple sign Thumbprint sign Traction bronchiectasis Tree-in-bud sign Westermark sign
Urogenital	Canga's bead symptom
Musculoskeletal	Crescent sign Fabella sign Fat pad sign/Sail sign of the elbow Osteopathia striata
Gastrointestinal	Cupola sign Double bubble Endoexoenteric Football sign Hampton's line Hot quadrate sign Mumoli's sign Omental cake Pneumatosis intestinalis Rigler's sign Sentinel loop
Neurological	Hyperdense middle cerebral artery

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