Kadota K, Nei T, Nizeki H, Kita M
J Comp Pathol. 1985 Apr;95(2):291-4. doi: 10.1016/0021-9975(85)90015-5.
Two cases of undifferentiated tumours were found in cows. Electron microscopy revealed that one was an undifferentiated squamous cell carcinoma of unknown primary site and the other an undifferentiated adenocarcinoma of the lung.