title: Carbon ion radiation therapy improves the prognosis of unresectable adult bone and soft-tissue sarcoma of the head and neck.
abstract: OBJECTIVE
  To evaluate the safety and efficacy of carbon ion radiotherapy (C-ion RT) with 70.4 GyE for unresectable bone and soft-tissue sarcoma of the adult head and neck.
  
  
  METHODS
  Twenty-seven patients (mean age, 46.2 years) were enrolled in this prospective study on C-ion RT with 70.4 GyE/16 fractions (fr) between April 2001 and February 2008. The primary end points were acute and late reactions of normal tissues, local control rate, and overall survival rate. The secondary end point was efficacy of the treatment in comparison to historical results with 57.6 or 64.0 GyE/16 fr.
  
  
  RESULTS
  The 3-year local control rate and overall survival rate for all patients were 91.8% (95% confidence interval [CI] = 81.0-100%) and 74.1% (95% CI = 57.5-90.6%), respectively. Acute reaction of Grade 3 or more was observed in only 1 patient. With regard to late reactions, visual loss was observed in 1 patient and a Grade 3 reaction of the maxillary bone was observed in 4 patients. A comparison with historical results revealed that the local control rate with 70.4 GyE was significantly higher than that with 57.6 or 64.0 GyE (3-year, 91.8% vs. 23.6%, p < 0.0001). Furthermore, the overall survival with 70.4 GyE tended to be higher than that with 57.6 or 64.0 GyE (3-year, 74.1% vs. 42.9%, p = 0.09).
  
  
  CONCLUSIONS
  C-ion RT with 70.4 GyE/16 fr for bone and soft-tissue sarcoma of the adult head and neck appears to be effective with acceptable toxicities in comparison to conventional RT and C-ion RT with lower doses.
authors: Research Center for Charged Particle Therapy, National Institute of Radiological Sciences (NIRS), Chiba, Japan.
authors: Keiichi
authors: K
authors: Jingu
authors: Hirohiko
authors: H
authors: Tsujii
authors: Jun-Etsu
authors: JE
authors: Mizoe
authors: Azusa
authors: A
authors: Hasegawa
authors: Hiroki
authors: H
authors: Bessho
authors: Ryo
authors: R
authors: Takagi
authors: Takamichi
authors: T
authors: Morikawa
authors: Morio
authors: M
authors: Tonogi
authors: Hiroshi
authors: H
authors: Tsuji
authors: Tadashi
authors: T
authors: Kamada
authors: Shogo
authors: S
authors: Yamada
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001859:Bone Neoplasms / Q000401:mortality / Q000532:radiotherapy*; D002244:Carbon / Q000009:adverse effects / Q000627:therapeutic use*; D005260:Female; D006258:Head and Neck Neoplasms / Q000401:mortality / Q000532:radiotherapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D058958:Organs at Risk / Q000528:radiation effects; D011446:Prospective Studies; D011832:Radiation Injuries / Q000150:complications; D012509:Sarcoma / Q000401:mortality / Q000532:radiotherapy*; D015996:Survival Rate; D055815:Young Adult
chemical_list: D002244:Carbon