At the end of the post you can vote for the right diagnosis.

The lesions shown in the images are from bufalos of the same herd.

Microscopically, in both cases, cystic lesions were observed associated to a granulomatous immfalamtory infiltrate, with abundant eosinophils.

Big intraparenquimatous cyst in the liver.

Intraparenquimatous pulmonary cyst.

ANSWER:
An 80% of the answers were right to establish a diagnosis of a parasitic disease. The intraparenquimatous localization of the cysts pointed to a diagnois of an Hydatid cyst (both E.granulosus and E. multilocularis can produce such lesions).

From a total of 26 answers: 50% E. granulosus, 31% E. multilocularis, 12% Congenital epithelial cysts and 8% C. tenuicuollis.