Jaagsiekte sheep retrovirusPulmonary Adenomatosis, OvineAdenocarcinomaSheepLung NeoplasmsAdenocarcinoma, Bronchiolo-AlveolarMesotheliomaPulmonary Surfactant-Associated Protein AKeratin-7ProteolipidsImmunohistochemistryTumor Markers, BiologicalSolitary Pulmonary NodulePulmonary SurfactantsPneumonectomyLungKeratins