title: Ultrastructure and origin of adenocarcinomas detected in the lungs of three cows.
abstract: Three types of bovine adenocarcinoma were found in the lungs of 3 cows. Case 1 was a well differentiated adenocarcinoma with mucin granules and microvilli with core filaments seen ultrastructurally. In Case 2, the neoplastic tissue showed a sarcoma-like growth with scattered tubular structures. Many cilia were observed in the tubular structures and a few cilia were found in the anaplastic tissues. Case 3 had epithelial and undifferentiated tissues. A few mucin granules and cilia were observed in the tumours in both lung and kidney. The relationships between these neoplastic cells and bronchial epithelial cells are discussed.
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology / Q000648:ultrastructure / Q000662:veterinary*; D002282:Adenocarcinoma, Bronchiolo-Alveolar / Q000473:pathology / Q000648:ultrastructure / Q000662:veterinary; D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000473:pathology*; D005260:Female; D005354:Fibrosarcoma / Q000473:pathology / Q000648:ultrastructure / Q000662:veterinary; D008175:Lung Neoplasms / Q000473:pathology / Q000648:ultrastructure / Q000662:veterinary*; D008854:Microscopy, Electron