Table 2.
Descriptive analysis of mammary gland tumors in dogs registered at Vet-OncoNet database, between 2019 and 2022.
| Benign tumors | Malignant tumors | |||
|---|---|---|---|---|
| n | % | n | % | |
| Total (n = 1, 140) | 605 | 53.1 | 535 | 46.9 |
| Sex | ||||
| Female (n = 1, 115, 97.8%) | 588 | 52.7 | 527 | 47.3 |
| Male (n = 25, 2.2%) | 17 | 68.0 | 8 | 32.0 |
| Age | ||||
| 0–6 (n = 117, 10.3%) | 68 | 58.1 | 49 | 41.9 |
| 7–11 (n = 640, 56.1%) | 350 | 54.7 | 290 | 45.3 |
| >12 (n = 259, 22.7%) | 120 | 46.3 | 139 | 53.7 |
| Missings (n = 124, 10.9%) | 67 | 54.0 | 58 | 46.0 |
| Morphology (Vet − ICD − O) | (n > 10) | |||
| Complex adenoma (8983/0) | 220 | 19.3 | - | - |
| Benign mixed tumor, NOS (8940/0) | 218 | 19.1 | - | - |
| Complex carcinoma (8983.1/3) | - | - | 205 | 18.0 |
| Tubular carcinoma (8211/3) | - | - | 119 | 10.4 |
| Tubular adenoma (8211/0) | 113 | 9.9 | - | - |
| Solid carcinoma (8230/3) | - | - | 76 | 6.7 |
| Tubulopapillary carcinoma (8263/3) | - | - | 46 | 4.0 |
| Intraductal papillary adenoma (8503/0) | 16 | 1.4 | - | - |
| Carcinosarcoma, NOS (8980/3) | - | - | 15 | 1.3 |
| Invasive micropapillary carcinoma (8507/3) | - | - | 10 | 0.9 |
| Others | 37 | 3.2 | 65 | 5.7 |