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Rounded Atelectasis
74 year old male with a cough.
CT shows split pleura sign with thickened visceral and parietal pleura with regions of early spiraling of an atelectatic process in the right lower lobe consistent with early rounded atelectasis
Ashley Davidoff MD TheCommonVein.net
31563c
Rounded Atelectasis
CT shows focal region of pleural thickening with calcification
Also note hyperlucent right lower lobe
Ashley Davidoff MD TheCommonVein.net
Rounded Atelectasis
CT shows focal region of pleural thickening with calcification
Also note hyperlucent right lower lobe
Ashley Davidoff MD TheCommonVein.net
Rounded Atelectasis
CT shows focal region of pleural thickening with calcification
Also note hyperlucent right lower lobe
Ashley Davidoff MD TheCommonVein.net
Rounded Atelectasis
CT shows focal region of pleural thickening with calcification
Also note hyperlucent right lower lobe
Ashley Davidoff MD TheCommonVein.net
Rounded Atelectasis
CT shows focal region of pleural thickening with calcification
Also note hyperlucent right lower lobe
Ashley Davidoff MD TheCommonVein.net
This CT collage represents the radiological findings of a patient with poorly differentiated small cell carcinoma, with extensive lymphangitic involvement of the RUL and occlusion of the airways of RML and RLL. Image 1 shows an emphysematous background involving the upper lobes, while image 2 shows lymphangitic disease of the RUL. A pinhole of air is surrounded by tumor and a calcified ring around the right mainstem bronchus, while the bronchus intermedius is totally occluded seen (calcified ring as well) with the lumen plugged by tumor and debris. These findings were confirmed by bronchoscopy. Note that the volume of the right lung is smaller than the left due to atelectasis and the constricting effect of lymphangitis.
Courtesy Ashley Davidoff MD.
TheCommonVein.net
32426_03cl keywords
lung bronchus lyphatic infiltrate mass obstruction atelectasis thickening interlobular septa neoplasm malignant primary malignancy small cell carcinoma imaging radiology CTscan
Small Cell Lung Carcinoma
This CT scan is from a middle aged female with poorly differentiated small cell carcinoma, with extensive mediastinal and hilar involvement (dark green in b) extending into and almost occluding the right main stem bronchus light green with black air in the centre) and occluding the smaller airways (light green surrounded by white bronchial cartilage). A complex right effusion (yellow) and atelectasis is seen (light pink). The relationship to the SVC (light blue ) is noted without mass effect at this time, with aorta in red and left pulmonary artery (royal blue). Parenchymal disease is suspected based on the increased soft tissue noted in the mediastinal windows in the right lower lobe.
Courtesy Ashley Davidoff MD 
TheCommonVein.net
32429bc03.8s
Comet tail sign. Rounded atelectasis within the right lower lobe (A) and abutting the posterior pleural surface in a patient with previous asbestos exposure. There is adjacent pleural thickening (B, white arrow), calcified pleural plaques, and signs of volume loss with downward retraction of the major fissure. The swirling of the bronchovascular bundle is thought to resemble a comet’s tail.
Source
Signs in Thoracic Imaging
Journal of Thoracic Imaging 21(1):76-90, March 2006.