[Neoplasms originating from large granular lymphocytes in a dog and cats].

Clinical, cytological and pathological findings in three cases of large granular lymphoma in a dog and two cats are presented. These tumors consist of large granular lymphocytes, which have been in part classified as natural killer cells, based on their phenotype and functional aspects. It is likely that such tumors are more frequent than commonly appreciated, because they are only recognized as such in cytological preparations or in electron microscopy.