Table 2 Pathological characteristics of the tissues were listed.

From: The pseudogene problem and RT-qPCR data normalization; SYMPK: a suitable reference gene for papillary thyroid carcinoma

Parameter

PTC

Adjacent normal tissue

Total

Tissue number

10

10

20

Histopathology

Classical PTC

6

  

Follicular variant-PTC

4

  

Age

 < 55 years old

8

  

 ≥ 55

2

  

Tumor size (cm)

 ≤ 1

4

  

1–2

6

  

Capsular invasion

Negative

9

  

Positive

1

  

Lymph-vascular invasion

Negative

6

  

Positive

4

  

Lymph node metastasis

Negative

6

  

Positive

4

  

TNM stagea

T1bN0M0

3

  

T1aN1aM0

2

  

T1bN1aM0

1

  

T1bN1bM0

1

  

T1aNxMx

1

  

T1aNxM0

1

  

T3N0M0

1

  
  1. PTC; papillary thyroid carcinoma,
  2. aTNM staging system is developed and is maintained by the Union for International Cancer Control (UICC), TNM stands for Tumour, Node, Metastasis.