Table 3. Comparison of ultrasonographic features.
| Benign (n=43) | Non-benign (n=14) | Total (n=57) | P-value | |
|---|---|---|---|---|
| Side, n (%) | 0.701 | |||
| Right | 23 (53.5) | 6 (42.9) | 29 (50.9) | |
| Left | 20 (46.5) | 8 (57.1) | 28 (49.1) | |
| Size, n (%) (#) | 0.038 * | |||
| <5 cm | 30 (70) | 6 (43) | 36 (63) | |
| 5-10 cm | 9 (21) | 1 (7) | 10 (18) | |
| >10 cm | 4 (9) | 7 (50) | 11 (19) | |
| Shape | 0.28 | |||
| Irregular | 25 (58.1) | 11 (78.6) | 36 (63.2) | |
| Oval | 15 (34.9) | 2 (14.3) | 17 (29.8) | |
| Round | 3 (7) | 1 (7.1) | 4 (7) | |
| Border, n (%) | 0.19 | |||
| Circumscribed | 32 (74.4) | 7 (50) | 39 (68.4) | |
| Not circumscribed | ||||
| Indistinct | 3 (7) | 3 (21.4) | 6 (10.5) | |
| Angular | 1 (2.3) | 0 (0) | 1 (1.8) | |
| Microlobulated | 7 (16.3) | 4 (28.6) | 11 (19.3) | |
| Spiculated | 0 (0) | 0 (0) | 0 (0) | |
| Echogenicity, n (%) | 0.019 * | |||
| Hypoechogenicity | 34 (79.1) | 6 (42.9) | 40 (70.2) | |
| Hyperechogenicity | 0 (0) | 0 (0) | 0 (0) | |
| Isoechogenicity | 1 (2.3) | 0 (0) | 1 (1.8) | |
| Heterogeneous echo | 8 (18.6) | 8 (57.1) | 16 (28.1) | |
| Posterior acoustic features, n (%) | 0.524 | |||
| Shadowing | 1 (2.3) | 0 (0) | 1 (1.8) | |
| Enhancement | 14 (32.6) | 8 (57.1) | 22 (38.6) | |
| Mixed feature | 2 (4.7) | 2 (14.3) | 4 (7.0) | |
| None | 19 (44.2) | 4 (28.6) | 23 (40.4) | |
| Cystic area, n (%) | 1 | |||
| Present | 29 (67.4) | 9 (64.3) | 38 (66.7) | |
| Absent | 14 (32.6) | 5 (35.7) | 19 (33.3) | |
| Vascularity, n (%) | 0.04 * | |||
| Absent | 4 (9.3) | 3 (21.4) | 7 (12.3) | |
| Internal vascularity | 37 (86) | 8 (57.1) | 45 (78.9) | |
| Vessels in rim | 2 (4.7) | 3 (21.4) | 5 (8.8) | |
*
Statistically significant at p value < 0.05 determined by Fisher’s exact test.