Dedicated linear accelerator radiosurgery for the treatment of XXXX .

@entity1 @entity4254 @entity1183 @entity158
OBJECT: In this study the authors evaluate the efficacy of and complications associated with dedicated linear accelerator (LINAC) radiosurgery for @entity4254 ( @entity4254 ). METHODS: Between August 1995 and February 2001, 60 @entity1 whose median age was 66.1 years (range 45-88 years) were treated with dedicated LINAC radiosurgery for @entity4254 . Forty-one @entity1 (68.3%) had essential @entity4254 , 12 (20%) had secondary @entity158 , and seven (11.7%) had atypical features. Twenty-nine @entity1 (48.3%) had undergone previous surgical procedures. Radiation doses varied between 70 and 90 Gy (mean 83.3 Gy) at the isocenter, with the last 35 @entity1 (58.3%) treated with a 90-Gy dose. A 5-mm collimator was used in 45 @entity1 (75%) and a 7.5-mm collimator in 15 @entity1 (25%). Treatment was focused at the nerve root entry zone. At last follow up (mean follow-up period 23 months, range 2-70 months), 36 (87.8%) of the 41 @entity1 with essential @entity4254 had sustained significant @entity158 relief (good plus excellent results). Twenty-three @entity1 (56.1%) were @entity158 free without medication (excellent outcome), 13 (31.7%) had a 50 to 90% reduction in @entity158 with or without medication (good outcome), and five (12.2%) had minor improvement or no relief. Of 12 @entity1 with secondary @entity158 , significant relief was sustained in seven @entity1 (58.3%); worse results were found with @entity158 . Fifteen (25%) of the 60 @entity1 experienced new @entity1183 postprocedure; no other significant complications were found. @entity158 relief was experienced at a mean of 2.7 months (range 0-12 months). CONCLUSIONS: Dedicated LINAC radiosurgery is a precise and effective treatment for @entity4254 .
