| Total | Malignant | Benign | ||||||
---|---|---|---|---|---|---|---|---|---|
 | Heterogeneous echogenicity | Homogeneous echogenicity | P-value | Heterogeneous echogenicity | Homogeneous echogenicity | P-value | Heterogeneous echogenicity | Homogeneous echogenicity | P-value |
Total number | 317 | 1132 | Â | 68 | 257 | Â | 249 | 875 | Â |
Echogenicity | Â | Â | 0.078 | Â | Â | 0.174 | Â | Â | 0.068 |
  Hyper/isoechogenicity | 125 (39.4) | 525 (46.4) |  | 3 (4.4) | 28 (10.9) |  | 122 (49.0) | 497 (56.8) |  |
  Hypoechogenicity | 176 (55.5) | 549 (48.5) |  | 56 (82.4) | 186 (72.4) |  | 120 (48.2) | 363 (41.5) |  |
  Marked hypoechogenicity | 16 (5.1) | 58 (5.1) |  | 9 (13.2) | 43 (16.7) |  | 7 (2.8) | 15 (1.7) |  |
Margin | Â | Â | 0.005 | Â | Â | 0.314 | Â | Â | <0.001 |
  Well circumscribed | 203 (64.0) | 818 (72.3) |  | 12 (17.7) | 60 (23.4) |  | 191 (76.7) | 758 (86.6) |  |
  microlobulated or irregular | 114 (36.0) | 314 (27.7) |  | 56 (82.4) | 197 (76.7) |  | 58 (23.3) | 117 (13.4) |  |
Calcifications | Â | Â | 0.849 | Â | Â | 0.986 | Â | Â | 0.555 |
  Microcalcifications | 42 (13.3) | 141 (12.5) |  | 29 (42.7) | 108 (42.0) |  | 13 (5.2) | 33 (3.8) |  |
  Macrocalcifications | 39 (12.3) | 151 (13.3) |  | 9 (13.2) | 36 (14.0) |  | 30 (12.1) | 115 (13.1) |  |
  No calcifications | 236 (74.5) | 840 (74.2) |  | 30 (44.1) | 113 (44.0) |  | 206 (82.7) | 727 (83.1) |  |
Shape | Â | Â | 0.737 | Â | Â | 0.790 | Â | Â | 0.245 |
  Wider than tall | 251 (79.2) | 906 (80.0) |  | 29 (42.7) | 105 (40.9) |  | 222 (89.2) | 801 (91.5) |  |
  Taller than wide | 66 (20.8) | 226 (20.0) |  | 39 (57.4) | 152 (59.1) |  | 27 (10.8) | 74 (8.5) |  |