Enzootic nasal adenocarcinoma
Enzootic nasal adenocarcinoma is a fatal, malignant neoplastic, infectious disease in sheep and goats. It is caused by the Enzootic nasal tumor virus, a retrovirus similar to Jaagsiekte sheep retrovirus, which causes a similar disease, also in sheep and goats called Ovine pulmonary adenocarcinoma (OPA).
Source: Wikipedia — Enzootic nasal adenocarcinoma (CC BY-SA 4.0)