Tag Archive | lung

Holly leaf sign - refers to the typical chest radiograph…

Holly leaf sign - refers to the typical chest radiograph appearance of calcified pleural plaques. The well-defined but irregular thickened edges simulate the appearance of a holly leaf. ‘Geographic density’ is another common term used to describe their appearance. Pleural plaques are the most common form of asbestos related disease

A MERRY CHRISTMAS TO YOU ALL from the team at Radiopaedia.org

from our tumblr blog

http://radiologysigns.tumblr.com/

Golden S sign – a chest radiograph sign of right upper lobe…

Golden S sign – a chest radiograph sign of right upper lobe collapse due to an obstructing central mass. The margin of the collapsed upper lobe forms a reverse S shape (blue line) as the peripheral lung collapses with a concave outline while the more central lung maintains a convex margin around the mass. The sign is highly suggestive of primary lung cancer and should prompt further investigation with CT. 

from our tumblr blog

http://radiologysigns.tumblr.com/

Garland triad – a chest radiograph sign of sarcoidosis. It…

Garland triad – a chest radiograph sign of sarcoidosisIt refers to a triad of lymph node enlargement; right paratracheal, right hilar and left hilar. This pattern of nodal enlargement, also known as the 1-2-3 sign, is not typical of lung caner or lymphoma which are other common causes of lymphadenopathy on chest xray. The above case also demonstrates lung parenchymal involvement with predominantly perihilar opacity simulating pulmonary oedema

from our tumblr blog

http://radiologysigns.tumblr.com/

Pancoast tumour - a primary lung cancer that arises in the lung…

Pancoast tumour - a primary lung cancer that arises in the lung apex and invades soft tissues such as the brachial plexus. Although classically these tumours present with Pancoast syndrome (shoulder pain, C8 to T1 radiculopathy, Horner’s syndrome) this only occurs in approximately 25% of cases. The lung apex is an important check area on chest radiographs. Any density difference between the left and right is suspicious. CT in this case confirms a lung mass invading adjacent soft tissues and destroying the second rib.  

from our tumblr blog

http://radiologysigns.tumblr.com/

Unilateral hyperlucent hemithorax – when one side of the chest…

Unilateral hyperlucent hemithorax – when one side of the chest is more lucent (black) than the other on a frontal chest radiograph. There are many potential causes including a few tricky ones. Some important things to consider:

  • rotated patient – can create a dramatic density difference
  • chest wall soft-tissue differences - particularly mastectomy (left image)
  • pneumothorax – always important! (right image)
  • air-trapping – particularly inhaled foreign bodies (check valve effect)
  • reduced lung vascularity – eg. pulmonary embolism (Wetermark’s sign)
  • contralateral increased density – eg. pleural effusion on other side

from our tumblr blog

http://radiologysigns.tumblr.com/

Honeycombing – a common and distinctive CT finding in pulmonary…

Honeycombing – a common and distinctive CT finding in pulmonary fibrosis (usual interstitial pneumonia). It refers to clustered cystic air spaces between 0.3 to 1.0 cm in diameter typically in a subpleural basal distribution. The walls of the cysts are usually well-defined and thick. Honeycombing is an irreversible finding in interstitial lung disease and associated with a poor prognosis.

from our tumblr blog

http://radiologysigns.tumblr.com/

Tree in bud sign – describes the CT chest appearance of multiple…

Tree in bud sign – describes the CT chest appearance of multiple centrilobular nodules that are connected by branching opacified bronchioles. Although initially described in patients with endobronchial tuberculosis, it is now recognised in a large number of conditions ranging from small airways infections like mycobacterium avium complex, to connective tissue diseases like rheumatoid arthritis, to neoplastic conditions like bronchioloalveolar cell carcinoma.

from our tumblr blog: http://radiologysigns.tumblr.com/post/26951480530

http://radiologysigns.tumblr.com/

Comet tail sign – a CT chest sign of round atelectasis. It…

Comet tail sign – a CT chest sign of round atelectasis. It consists of spiralling curvilinear opacities extending out to a subpleural “mass”. The rounded nature of the mass-like collapsed portion of lung causes the adjacent bronchovascular bundles to be pulled in resembling a comet tail. Round atelectasis is most commonly the result of asbestos related pleural disease

from our tumblr blog: http://radiologysigns.tumblr.com/post/25815534459

http://radiologysigns.tumblr.com/

Signet ring sign – a CT feature of bronchiectasis. As a general…

Signet ring sign – a CT feature of bronchiectasis. As a general rule a bronchus should be no larger than its accompanying pulmonary artery, and if a bronchus is more than 50% larger then this is diagnostic of bronchiectasis. When a dilated bronchiectatic bronchus is viewed in cross-section next to its smaller accompanying pulmonary artery this simulates the appearance of a signet ring, a type of ring once worn by nobles who used them to apply wax seals to their correspondences. 

from our tumblr blog: http://radiologysigns.tumblr.com/post/25330514278

http://radiologysigns.tumblr.com/

Hemithorax white-out – it is not hard to detect a completely…

Hemithorax white-out – it is not hard to detect a completely opacified hemithorax, however determining the underlying cause by assessing secondary signs is more of a challenge. The position of the mediastinum and trachea is the key. A large pleural effusion will expand the hemithorax and push the trachea away (left image). Conversely, a completely collapsed lung has reduced volume and will pull the trachea towards the white-out (right image), as will a pneumonectomy. A completely consolidated lung (eg. pneumonia) will have preserved volume and therefore the trachea will remain midline.  

from our tumblr blog: http://radiologysigns.tumblr.com/post/24852717957

http://radiologysigns.tumblr.com/

Follow

Get every new post delivered to your Inbox.

Join 99 other followers