Table 3 Malignancy Risk Stratified by Degree of Hypoechogenicity and Predominant Echogenicity According to Composition and suspicious Features.
Echogenicity | All | Nodules with suspicious featuresa | Nodules without suspicious featuresa | ||||||
|---|---|---|---|---|---|---|---|---|---|
No. of malignant nodules, N (%) | No. of nodules, N (%) | Malignancy risk (%) | No. of malignant nodules, N (%) | No. of nodules, N (%) | Malignancy risk (%) | No. of malignant nodules, N (%) | No. of nodules, N (%) | Malignancy risk (%) | |
All | |||||||||
Marked hypoechogenicity | 204 (18.7) | 315 (5.6) | 64.8 | 178 (25.1) | 228 (15.1) | 78.1 | 26 (6.9) | 87 (2.1) | 29.9 |
Moderate hypoechogenicity | 340 (31.2) | 705 (12.6) | 48.2 | 261 (36.8) | 370 (24.5) | 70.5 | 79 (20.8) | 334 (8.2) | 23.7 |
Mild hypoechogenicity | 234 (21.5) | 994 (17.7) | 23.5 | 138 (19.4) | 316 (21.1) | 43.7 | 96 (25.3) | 677 (16.6) | 14.2 |
Iso- or hyperechogenicity | 311 (28.6) | 3587 (64.0) | 8.7 | 133 (18.7) | 594 (39.4) | 22.4 | 177 (47.0) | 2989 (73.1) | 5.9 |
Total | 1089 (100.0) | 5601 (100.0) | 19.4 | 710 (100.0) | 1508 (100.0) | 47.1 | 378 (100.0) | 4087 (100.0) | 9.2 |
Solid | |||||||||
Marked hypoechogenicity | 201 (22.4) | 304 (10.0) | 66.1 | 176 (28.0) | 224 (20.7) | 78.6 | 25 (9.3) | 80 (4.1) | 31.3 |
Moderate hypoechogenicity | 312 (34.8) | 596 (19.6) | 52.3 | 244 (38.8) | 333 (30.8) | 73.3 | 68 (25.4) | 263 (13.4) | 25.9 |
Mild hypoechogenicity | 192 (21.4) | 660 (21.7) | 29.1 | 116 (18.4) | 223 (20.6) | 52.0 | 76 (28.4) | 437 (22.3) | 17.4 |
Iso- or hyperechogenicity | 192 (21.4) | 1481 (48.7) | 13.0 | 93 (14.8) | 300 (27.8) | 31.0 | 99 (36.9) | 1181 (60.2) | 8.4 |
Total | 897 (100.0) | 3041 (100.0) | 29.5 | 629 (100.0) | 1080 (100.0) | 58.2 | 268 (100.0) | 1961 (100.0) | 13.7 |
Partially cystic | |||||||||
Marked hypoechogenicity | 3 (1.6) | 11 (0.4) | 27.3 | 2 (2.5) | 4 (0.9) | 50.0 | 1 (0.9) | 7 (0.3) | 14.3 |
Moderate hypoechogenicity | 28 (14.6) | 109 (4.3) | 25.7 | 17 (21.0) | 37 (8.6) | 45.9 | 11 (9.9) | 72 (3.4) | 15.3 |
Mild hypoechogenicity | 42 (21.9) | 334 (13.0) | 12.6 | 22 (27.2) | 93 (21.7) | 23.7 | 20 (18.0) | 241 (11.3) | 8.3 |
Iso- or hyperechogenicity | 119 (62.0) | 2106 (82.3) | 5.7 | 40 (49.4) | 294 (68.7) | 13.6 | 79 (71.2) | 1812 (85.0) | 4.4 |
Total | 192 (100.0) | 2560 (100.0) | 7.5 | 81 (100.0) | 428 (100.0) | 18.9 | 111 (100.0) | 2132 (100.0) | 5.2 |
