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Table 2 Results of single factor K-M analysis of ultrasound characteristics and their relation to recurrence of MTC

From: Correlation between preoperative ultrasonic features of medullary thyroid carcinoma and postoperative recurrence

group character recurrence group (cases) Non- recurrence group (cases) Chi-square P
Number single focus 10 42 0.847 0.357
multiple focus 7 15
Composition solid 16 51 0.605 0.437
cystic solid 1 6
cystic 0 0
Echo very low echo 3 17 1.119 0.773
low echo 12 36
equal echo 2 3
high echo 0 1
Boundary clear 10 41 1.370 0.242
unclear 7 16
Morphology regular 4 26 2.609 0.106
irregular 13 31
Aspect ratio (Front and back diameter/ Left and right diameter) ≥1 2 5 0.023 0.881
<1 15 52
Calcification yes 12 36 0.525 0.469
no 5 21
Blood flow* yes 12 38 0.337 0.562
no 2 11
  1. *Notes: Only 63 patients had ultrasonic data on blood flow