title: [An investigation of BRAF mutation in papillary thyroid carcinoma and its clinical value].
abstract: OBJECTIVE
  To study the relationship between BRAF mutation and clinicopathological features in papillary thyroid carcinoma (PTC).
  
  
  METHODS
  Fresh samples were examined for the presence of BRAF mutations in 43 patients with PTC and 20 patients with non-PTC thyroid disease and 40 normal thyroid tissues by polymerase chain reaction (PCR) and direct sequencing. The relationship between BRAF mutation and clinicopathological features was studied.
  
  
  RESULTS
  BRAF mutation was detected in 39.5% (17/43) of PTC samples, in 0 of non-PTC thyroid disease samples and normal thyroid tissues. Significant association was seen between BRAF mutation and both extrathyroidal invasion and cervical lymph node metastasis (P<0.05, P<0.05). There was no significant relationship between BRAF mutation and gender, age at the time of diagnosis, tumor size and distant metastasis.
  
  
  CONCLUSIONS
  BRAF mutation is associated with extrathyroidal invasion and lymph node metastasis. It may increase the ability of invasion and metastasis of PTC and have influence on prognosis.
authors.affiliation: Department of Thyroid and Breast Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041 PR China.
authors.forename: Ri-xiang
authors.initials: RX
authors.lastname: Gong
authors.forename: Yang
authors.initials: Y
authors.lastname: Zhou
authors.forename: Shu-hua
authors.initials: SH
authors.lastname: Luo
authors.forename: Lin
authors.initials: L
authors.lastname: Zhang
authors.forename: Bin
authors.initials: B
authors.lastname: Zhou
mesh_terms: D000231:Adenocarcinoma, Papillary / Q000175:diagnosis / Q000235:genetics; D000328:Adult; D000368:Aged; D002291:Carcinoma, Papillary / Q000175:diagnosis / Q000235:genetics; D004252:DNA Mutational Analysis; D005260:Female; D006801:Humans; D008207:Lymphatic Metastasis / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness / Q000175:diagnosis / Q000473:pathology; D009364:Neoplasm Recurrence, Local / Q000175:diagnosis / Q000473:pathology; D011379:Prognosis; D048493:Proto-Oncogene Proteins B-raf / Q000235:genetics*; D013964:Thyroid Neoplasms / Q000175:diagnosis* / Q000235:genetics; D055815:Young Adult
chemical_list: C482119:BRAF protein, human; D048493:Proto-Oncogene Proteins B-raf