Abstract
During a period from 1975 to 1984, 42 canine and 47 feline autopsy cases were diagnosed as lymphoid and myeloid tumors, which corresponded to 15.4% of 272 and 50.5% of 93 neoplastic cases, respectively. Thirty-one of 1, 755 canine and 9 of 388 feline clinical biopsy cases were diagnosed as the tumors, corresponding to 3.33% of 930 and 8.49% of 106 neoplastic cases. Most of those cases were of lymphosarcoma, mainly of multicentric type. In canine cases, the incidence was higher in Shetland sheepdog and Boxer breeds. The ages of higher incidences were 4 to 5 and 8 years in dogs, while 1 to 3 and 8 years in cats. There was no sex predisposition in both animal species.
