• 1. Department of Ultrasound, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China;
  • 2. Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China;
  • 3. Center of Thyroid Disease Diagnosis and Treatment, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China;
PENGYu-lan, Email: yulanpeng@163.com
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Objective To study the expressions of BRAF gene in papillary thyroid microcarcinoma (PTMC) and papillary thyroid carcinoma (PTC) >1 cm in diameter, and the invasiveness of PTMC and PTC. Methods The data of 275 patients with PTC received surgical treatment and with BRAF gene mutation results in West China Hospital of Sichuan University from 2011 September to 2013 September were retrospectively analyzed. According to the size of tumors, the patients were divided into three groups, was the diameter <1 cm group, 1 cm< diameter≤2 cm group, and diameter >2 cm group,respectively. The ratio of BRAF gene mutation, and the degree of risk of extrathyroidal invasion and lymph node metastasis were compared. Results Univariate analysis showed that tumor size was not related with the age, gender, and BRAF gene mutation rate (P>0.05), while the tumor size was related with the extrathyroidal invasion and lymph node metastasis (P<0.05), and the ratio of BRAF gene mutation was related with the extrathyroidal invasion and lymph node metastasis (P<0.05). Multivariate analysis showed that tumor size was associated with extrathyroidal extension (P=0.009) and lymph node metastasis (P=0.000). Conclusions BRAF gene mutation can increase the extrathyroidal invasion and lymph node metastasis risk of PTC, and it is no significantly correlated with tumor size of PTC. The invasiveness of PTC increases with the increased of tumor size, but the PTMC of BRAF gene mutation positive is still require positive treatment.

Citation: YUBo-yang, YANGPan, MABu-yun, PENGYu-lan, XIONGSheng-hua, ZOUXiu-he. Study on Expression of BRAF Gene and Invasiveness of Papillary Thyroid Carcinoma. CHINESE JOURNAL OF BASES AND CLINICS IN GENERAL SURGERY, 2015, 22(7): 795-798. doi: 10.7507/1007-9424.20150207 Copy

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