Neoplasms of this organ may occur in any quadruped or bird and may be
recognized by the swelling of more or less of its substance, by the
unevenness of its free margin, or by distinct outgrowths from its
surface. They are especially common in dogs and pigs and may be fibrous,
epithelial or otherwise. The treatment is purely surgical and in case of
a malignant neoplasm should demand the removal of the entire organ.