Earlier interstitial lung disease:
The case below is an example of interstitial lung disease at an earlier stage in a patient with a history of breast cancer (and a prior right mastectomy). There are patchy areas of fine subpleural "lace-like" intralobular interstitial thickening. Thickened interlobular septa are also seen, as is honeycombing- particularly in the posterior costophrenic sulci. The fibrosis associated with interstitial lung disease produces architectural distortion which is not seen in patients with lymphangetic metastases.
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