[Clinical and pathologico-anatomic findings in a leiomyosarcoma of the jejunum of a sheep].

This paper describes a leiomyosarcoma found in the distal part of the jejunum of a 7 year old, East Friesian dairy sheep. The animal showed a progressive emaciation during 3 months, leucocytosis, neutrophilia, relative lymphocytopenia and increased levels of serum urea. On histology, the tumor was characterized by anaplasia, cellular and nuclear polymorphism and also by regressive processes and local invasion. Characteristic features such as numerous mitotic figures and giant cells were also observed.