Rounded Atelectasis


Figure 1. Rounded Atelectasis--CT

Image photographed in lung windows shows bilateral lower lobe, subpleural opacities associated with one or more vessels spiraling into each opacity, representing the comet tail sign.



Figure 2. Rounded Atelectasis--CT

Image photographed in soft tissue windows shows that the opacities are associated with abnormal pleura, bilaterally.

Figure 3. Gross Appearance

Here, a slice of lung shows focally thickened visceral pleura that has been drawn into the lung between the arrows. Note how vessels tend to converge toward the infolded pleura because of the focal atelectasis.

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