Echinococcosis cysts on the cranial regions of left main lobe and in the middle regions of the main right lobe. The greyish jagged lesion that can be seen on the caudal third of the left main lobe corresponds to an area of parenchymal densification secondary to localized interstitial pneumonia, as a response to the presence of strongylide eggs and larvae. This type of lesion is called an “incubation nodule”.

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