RESUMO: Foram estudados 720 casos de lesões na cavidade oral em cães diagnosticados entre 2015 e 2020, no Distrito Federal. Dessas alterações, 432 (60%) foram neoplásicas e 288 (40%) não neoplásicas. Dentre os neoplasmas, 229 (53%) foram consideradas malignos e 203 (47%) benignos, acometendo principalmente machos, de 43 raças diferentes, com idade média 9,4 anos, afetando principalmente gengiva e lábio. Melanoma foi o neoplasma mais comumente diagnosticado (96/432; 22,2%), seguido do fibroma odontogênico periférico (68/432; 15,7%), papiloma (63/432; 14,5%) e carcinoma de células escamosas (56/432; 12,9%). As lesões não neoplásicas também acometeram predominantemente machos, de 41 raças diferentes, com idade média 8,9 anos, afetando principalmente gengiva, lábio e língua. Essas lesões foram diagnosticadas como inflamatórias (230/288; 79,8%), hiperplásicas (47/288; 16,3%) e como outras alterações (11/288; 3,8%). RESUMO 72 201 2020 Federal 60% 60 (60% 28 40% 40 (40% neoplasmas 22 53% 53 (53% 20 47% 47 (47% benignos machos 4 diferentes 94 9 9, anos 96/432 96432 96 (96/432 22,2%, 222 22,2% , 2 22,2%) 68/432 68432 68 (68/432 15,7%, 157 15,7% 15 7 15,7%) 63/432 63432 63 (63/432 14,5% 145 14 5 56/432 56432 56 (56/432 12,9%. 129 12,9% . 12 12,9%) 89 8 8, língua 230/288 230288 230 (230/288 79,8%, 798 79,8% 79 79,8%) 47/288 47288 (47/288 16,3% 163 16 3 11/288 11288 11 (11/288 3,8%. 38 3,8% 3,8%) 202 6 (60 (40 (53 (47 96/43 9643 (96/43 22,2 68/43 6843 (68/43 15,7 1 63/43 6343 (63/43 14,5 56/43 5643 (56/43 12,9 230/28 23028 23 (230/28 79,8 47/28 4728 (47/28 16,3 11/28 1128 (11/28 3,8 (6 (4 (5 96/4 964 (96/4 22, 68/4 684 (68/4 15, 63/4 634 (63/4 14, 56/4 564 (56/4 12, 230/2 2302 (230/2 79, 47/2 472 (47/2 16, 11/2 112 (11/2 3, ( 96/ (96/ 68/ (68/ 63/ (63/ 56/ (56/ 230/ (230/ 47/ (47/ 11/ (11/ (96 (68 (63 (56 (230 (11 (9 (23 (1 (2
ABSTRACT: Seven hundred twenty cases of oral cavity lesions in dogs were diagnosed from 2015 to 2020 in Distrito Federal, Brazil. Four hundred thirty-two (60%) lesions were neoplastic, and 288 (40%) were non-neoplastic. Of the neoplasms, 229 (53%) were considered malignant and 203 (47%) benign, affecting mainly males, of 43 different breeds, with an average age of 9.4 years, mainly the gum and lip. Melanoma was the most (96/432, 22.2%) commonly diagnosed neoplasm, followed by peripheral odontogenic fibroma (68/432, 15.7%), papilloma (63/432, 14.5%) and squamous cell carcinoma (SCC) (56/432, 12.9%). Non-neoplastic lesions also affected males predominantly, from 41 different breeds, with an average age of 8.9 years, mainly in the gums, lip, and tongue. These lesions were diagnosed as inflammatory (230/288, 79.8%), hyperplastic (47/288, 16.3%) and other lesions (11/288, 3.8%). ABSTRACT 201 202 Federal Brazil thirtytwo thirty two 60% 60 (60% neoplastic 28 40% 40 (40% nonneoplastic. nonneoplastic non neoplastic. non-neoplastic neoplasms 22 53% 53 (53% 20 47% 47 (47% benign 4 breeds 94 9 9. years lip 96/432, 96432 96 432 (96/432 22.2% 222 2 neoplasm 68/432, 68432 68 (68/432 15.7%, 157 15.7% , 15 7 15.7%) 63/432, 63432 63 (63/432 14.5% 145 14 5 SCC (SCC 56/432, 56432 56 (56/432 12.9%. 129 12.9% . 12 12.9%) Nonneoplastic Non predominantly 89 8 8. gums tongue 230/288, 230288 230 (230/288 79.8%, 798 79.8% 79 79.8%) 47/288, 47288 (47/288 16.3% 163 16 3 11/288, 11288 11 (11/288 3.8%. 38 3.8% 3.8%) 6 (60 (40 (53 (47 96/432 9643 (96/43 22.2 68/432 6843 (68/43 15.7 1 63/432 6343 (63/43 14.5 56/432 5643 (56/43 12.9 230/288 23028 23 (230/28 79.8 47/288 4728 (47/28 16.3 11/288 1128 (11/28 3.8 (6 (4 (5 96/43 964 (96/4 22. 68/43 684 (68/4 15. 63/43 634 (63/4 14. 56/43 564 (56/4 12. 230/28 2302 (230/2 79. 47/28 472 (47/2 16. 11/28 112 (11/2 3. ( 96/4 (96/ 68/4 (68/ 63/4 (63/ 56/4 (56/ 230/2 (230/ 47/2 (47/ 11/2 (11/ 96/ (96 68/ (68 63/ (63 56/ (56 230/ (230 47/ 11/ (11 (9 (23 (1 (2