Distribution of ET and LC Disease

ET/LC may be diffuse, patchy, unilateral, or bilateral.

Example of Patchy Disease

This image shows more of the lung shown previously. Note that in this case, the interlobular and centrilobular thickenings do not extend to the pleura, suggesting patchy disease.

Note also that there are multiple tiny nodules in many lobules, indicating involvement of small bronchovascular bundles probably not visible on HRCT.

Note again the tumor in the hilar lymph nodes.

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