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Table 1 Tumor characteristics

From: Follicular thyroid carcinoma: differences in clinical relevance between minimally invasive and widely invasive tumors

Characteristics

MI-FTC

WI-FTC

p

42

29

Suspect of malignancy by cytology (pre-op)

30 (71.4 %)a

15 (51.7 %)b

0.133

Tumor size (mm), mean ± SD

27.05 ± 11.52

39.34 ± 15.44

0.000

  Range

6–52

16–75

 

  Median (95 % CI)

26 (23.57–30.53)

38 (33.72–44.96)

 

Tumor size ≤ 1.0 cm

4 (9.5 %)

0

0.140

Tumor size > 1.0 cm ≤ 2.0

9 (21.4 %)

2 (6.8 %)

0.180

Tumor size > 2.0 cm ≤ 4.0

25 (59.6 %)

15 (51.8 %)

0.628

Tumor size > 4 cm

4 (9.5 %)

12 (41.4 %)

0.003

Pathologic association

   

  Multinodular goiter

13 (30.9 %)

10 (34.6 %)

0.800

  Hashimoto’s thyroiditis

13 (30.9 %)

5 (17.2 %)

0.269

  Graves’ disease

1 (2.4 %)

0

0.851

  Normal thyroid

15 (35.8 %)

14 (48.2 %)

0.332

  Follicular thyroid adenoma

1 (2.4 %)

0

0.851

  Papillary microcarcinoma

6 (14.3 %)

3 (10.3 %)

0.729

Multifocality

0

2 (6.8 %)

0.163

Thyroid capsular invasion

0

1 (3.4 %)

0.408

Vascular invasion

9 (21.4 %)

15 (51.8 %)

0.011

Extra thyroid invasion

0

1 (3.4 %)

0.408

Lymph node metastasis

0

5 (17.2 %)

0.009

Well/Poorly differentiated

0

2 (6.8 %)

0.163

M1 at diagnosis

0

0

Concomitant parathyroid cancer

1 (2.4 %)

0

0.851

  1. MI-FTC minimally invasive - follicular thyroid carcinoma, WI-FTC widely invasive - follicular thyroid carcinoma, SD standard deviation, CI confidence interval, M1 metastasis to distant sites
  2. aMI-FTC: 28 Thy 3, 2 Thy 4
  3. bWI-FTC: 13 Thy 3, 2 Thy 4