title: Retrospective study on factors affecting the prognosis in oral cancer patients who underwent surgical treatment only.
abstract: BACKGROUND
  This study was performed to evaluate their 5-year survival rates and identify the factors affecting the prognosis of oral cancer patients who had undergone surgical treatment only.
  
  
  METHODS
  Among 130 patients who were diagnosed with malignant tumor of oral, maxillofacial, and surgical treated in the Department of Oral and Maxillofacial Surgery at Chonnam National University Hospital within a period from January 2000 to December 2010, for 11 years, 84 patients were investigated who were followed up for more than 5 years after radical surgery; oral cancer is primary and received only surgical treatment. The survival rate according to gender, age, type and site of cancer, TNM stage, cervical lymph node metastasis and its stage, recurrence or metastasis, time of recurrence and metastasis, and differentiation were investigated and analyzed.
  
  
  RESULTS
  Overall, 5-year survival rate in patients who received only surgical treatment was 81.2 %, and disease-specific 5-year survival rate was 83.1 %. The disease-specific 5-year survival rate based on TNM stage, metastasis of cervical lymph node, N stage, and presence of recurrence/metastasis was a significant difference (p< 0.05). The disease-specific 5-year survival rate based on sex, age, type of tumor, primary site, and differentiation was not a significant difference (p> 0.05).
  
  
  CONCLUSIONS
  These results suggest that good survival rate can be obtained with surgical treatment only, and stage of oral cancer, cervical lymph node metastasis and stage, recurrence or metastasis, time of recurrence, and metastasis have a significant effect on survival rate in oral cancer patients.
authors.affiliation: Department of Oral and Maxillofacial Surgery, School of Dentistry, Dental Science Research Institute, Chonnam National University, 77, Yongbongro, Buk-Gu, Gwangju, 500-757 South Korea.
authors.forename: Byeong-Guk
authors.initials: BG
authors.lastname: Kim
authors.affiliation: Department of Oral and Maxillofacial Surgery, School of Dentistry, Dental Science Research Institute, Chonnam National University, 77, Yongbongro, Buk-Gu, Gwangju, 500-757 South Korea.
authors.forename: Jun-Hwa
authors.initials: JH
authors.lastname: Kim
authors.affiliation: Department of Oral and Maxillofacial Surgery, School of Dentistry, Dental Science Research Institute, Chonnam National University, 77, Yongbongro, Buk-Gu, Gwangju, 500-757 South Korea.
authors.forename: Myung-In
authors.initials: MI
authors.lastname: Kim
authors.affiliation: Department of Oral and Maxillofacial Surgery, School of Dentistry, Dental Science Research Institute, Chonnam National University, 77, Yongbongro, Buk-Gu, Gwangju, 500-757 South Korea.
authors.forename: Jeong Joon
authors.initials: JJ
authors.lastname: Han
authors.affiliation: Department of Oral and Maxillofacial Surgery, School of Dentistry, Dental Science Research Institute, Chonnam National University, 77, Yongbongro, Buk-Gu, Gwangju, 500-757 South Korea.
authors.forename: Seunggon
authors.initials: S
authors.lastname: Jung
authors.affiliation: Department of Oral and Maxillofacial Surgery, School of Dentistry, Dental Science Research Institute, Chonnam National University, 77, Yongbongro, Buk-Gu, Gwangju, 500-757 South Korea.
authors.forename: Min-Suk
authors.initials: MS
authors.lastname: Kook
authors.affiliation: Department of Oral and Maxillofacial Surgery, School of Dentistry, Dental Science Research Institute, Chonnam National University, 77, Yongbongro, Buk-Gu, Gwangju, 500-757 South Korea.
authors.forename: Hong-Ju
authors.initials: HJ
authors.lastname: Park
authors.affiliation: Department of Oral and Maxillofacial Surgery, School of Dentistry, Dental Science Research Institute, Chonnam National University, 77, Yongbongro, Buk-Gu, Gwangju, 500-757 South Korea.
authors.forename: Sun-Youl
authors.initials: SY
authors.lastname: Ryu
authors.affiliation: Department of Oral and Maxillofacial Surgery, School of Dentistry, Dental Science Research Institute, Chonnam National University, 77, Yongbongro, Buk-Gu, Gwangju, 500-757 South Korea.
authors.forename: Hee-Kyun
authors.initials: HK
authors.lastname: Oh
keywords: Neoplasm metastasis; Oral cancer; Recurrence; Survival rate; TNM classification