Table 1 Demographics of feline mammary cases
From: Significance of sphingosine kinase 1 expression in feline mammary tumors
| Â | Malignant tumor | ||||
|---|---|---|---|---|---|
| Â | Tubular | Tubulopapillary | Solid | Comedo | Total |
Histological grade (Elston and Ellis) | |||||
 1 | 36 | 4 | 15 | 2 | 57 |
 2 | 15 | 0 | 8 | 1 | 24 |
 3 | 2 | 0 | 3 | 2 | 7 |
Histological grade (Mills et al.) | |||||
 1 | 29 | 2 | 11 | 1 | 43 |
 2 | 21 | 1 | 8 | 0 | 30 |
 3 | 3 | 1 | 7 | 4 | 15 |
 ER-positive | 11 | 1 | 2 | 0 | 14 |
 HER2-positive | 28 | 1 | 13 | 3 | 45 |
 SPHK1-positive | 29 | 2 | 17 | 5 | 53 |