[Lymphosarcoma in a horse].

A sixteen-year old pregnant Dutch Warmblood mare was referred to the Faculty of Veterinary Medicine because of sluggishness since eight days. The main clinical features were depression, pale mucous membranes with petechiae, ventral oedema and fever. Haematological evaluation revealed severe anaemia (haematocrit 0.15 L.L.-1) and leukopenia (2.3 G.L-1 with 96% lymphocytes). There was no thrombocytopenia. The horse died following a hospitalisation period of six days. At necropsy a (multicentric) lymphosarcoma was found in the bone marrow with neoplastic infiltration of the kidneys.