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Table 4 Comparison of each US feature of 1399 thyroid nodules excluding thyroid nodules with cytologic results of lymphocytic thyroiditis according to underlying echogenicity

From: Heterogeneous echogenicity of the underlying thyroid parenchyma: how does this affect the analysis of a thyroid nodule?

  Total Malignant Benign
  Heterogeneous echogenicity Homogeneous echogenicity P-value Heterogeneous echogenicity Homogeneous echogenicity P-value Heterogeneous echogenicity Homogeneous echogenicity P-value
Total number 280 1119   68 257   212 862  
Echogenicity    0.209    0.174    0.366
  Hyper/isoechogenicity 114 (40.7) 520 (46.5)   3 (4.4) 28 (10.9)   111 (52.4) 492 (57.1)  
  Hypoechogenicity 152 (54.3) 543 (48.5)   56 (82.4) 186 (72.4)   96 (45.3) 357 (41.4)  
  Marked hypoechogenicity 14 (5.0) 56 (5.0)   9 (13.2) 43 (16.7)   5 (2.4) 13 (1.5)  
Margin    0.012    0.314    0.007
  Well circumscribed 182 (65.0) 813 (72.7)   12 (17.6) 60 (23.3)   170 (80.2) 753 (87.4)  
  microlobulated or irregular 98 (35.0) 306 (27.3)   56 (82.4) 197 (76.7)   42 (19.8) 109 (12.6)  
Calcifications    0.728    0.986    0.613
  Microcalcifications 40 (14.3) 140 (12.5)   29 (42.7) 108 (42.0)   11 (5.2) 32 (3.7)  
  Macrocalcifications 37 (13.2) 149 (13.3)   9 (13.2) 36 (14.0)   28 (13.2) 113 (13.1)  
  No calcifications 203 (72.5) 830 (74.2)   30 (44.1) 113 (44.0)   173 (81.6) 717 (83.2)  
Shape    0.306    0.790    0.124
  Wider than tall 217 (77.5) 898 (80.3)   29 (42.6) 105 (40.9)   188 (88.7) 793 (92.0)  
  Taller than wide 63 (22.5) 221 (19.7)   39 (57.4) 152 (59.1)   24 (11.3) 69 (8.0)