he CT shows a lesion that originates in the lung. Many would have a lungcancer on the top of their differential diagnostic list. However there is also some pleural thickening (red arrow) and vessels seem to swirl around the mass (blue arrows). This is also described as the comet tail sign (4). Whenever you see a pleural-based lesion that looks like a lungcancer, also consider the possibility of rounded atelectasis. Rounded atelectasis is a benign lesion and when the findings are convincing, then biopsy is not needed. During follow up these lesions usually do not change in configuration. Rounded atelectasis is frequently seen in patients with a history of asbest exposure. #Clinical #Radiology #CTChest #RoundedAtelectasis #Rounded #Atelectasis #CometTail #Sign #RadiologyAssistant
