Table 2.
Qualitative variables in percentage of cases; and Mean ± SD of quantitative variables evaluated by different ultrasonography methods (B-mode, Doppler and ARFI-elastography) in inguinal lymph nodes of bitches with mammary neoplasms.
| Parameter | Free | Reactive | Metastatic | P-value | |
|---|---|---|---|---|---|
| B-Mode ultrasonography | |||||
| Shape | Elongated | 80% (24) | 31% (16) | 22% (4) | 0,6104 |
| Rounded | 20% (6) | 69% (35) | 78% (15) | ||
| Echotexture | Homogeneous | 97% (29) | 91% (46) | 67% (13) | 0,5017 |
| Heterogeneous | 3% (1) | 9% (5) | 33% (6) | ||
| Mixed | 0% (0) | 0% (0) | 0% (0) | ||
| Echogenicity | Hypoechoic | 97% (29) | 98% (50) | 89% (17) | 0,2865 |
| Hyperechoic | 3% (1) | 2% (1) | 0% (0) | ||
| Mixed | 0% (0) | 0% (0) | 11% (2) | ||
| Short/Long axis ratio | 0,38 ± 0,10 | 0,37 ± 0,11 | 0,34 ± 0,10 | 0,4286 | |
| Doppler ultrasonography | |||||
| Vascularization | Present | 50% (15) | 58% (30) | 60% (11) | 0,1307 |
| Absent | 50% (15) | 42% (21) | 40% (8) | ||
| Localization | Peripheral | 100% (30) | 98% (50) | 78% (15) | 0,1537 |
| Central | 0% (0) | 2% (1) | 22% (4) | ||
| ARFI-Elastography | |||||
| Deformability | Hard | 10% (3)a | 15% (8)a | 67% (13)b | 0,0004* |
| Soft | 90% (27) | 85% (43) | 33% (6) | ||
| Pattern | Homogeneous | 97% (29)a | 96% (49)a | 44% (8)b | 0,0009* |
| Heterogeneous | 3% (1) | 4% (2) | 56% (11) | ||
| SWV (m/s) | 1,91 ± 0,44a | 2,29 ± 0,19b | 2,99 ± 0,64c | 0,0001* | |
| Depth (cm) | 1,05 ± 0,40 | 1,00 ± 0,38 | 1,10 ± 0,30 | 0,6075 | |
cm: centimetres; s: seconds; m: meters; SD: standard deviation; *Considered statistically significant, where different letters indicate significance between the histopathological diagnoses (p < 0.05).