Radiation-induced XXXX deteriorating neurological symptoms and mimicking progression of brain @entity3 after stereotactic-guided radiotherapy.

@entity1 @entity66 @entity41 @entity39 @entity5 @entity4 @entity1313 @entity1149 @entity3145 @entity51 @entity1358 @entity3 @entity14
PURPOSE: Although @entity39 ( @entity39 ) is not a @entity5 in itself, the lesion progressively enlarges with mass effects and diffuse @entity4 in a way that resembles @entity5 . To identify the @entity39 that mimics progression of brain @entity3 , we performed surgical resections of symptomatic @entity66 . MATERIALS AND METHODS: From June 2003 to December 2005, 7 @entity1 received stereotactic-guided radiotherapy (SRT) for metastatic @entity1313 , and they later underwent craniotomy and @entity5 resection due to the progressive mass effects and the @entity4 that caused focal @entity51 . On MR imaging, a ring-like enhanced single lesion with massive @entity4 could not be distinguished from progression of brain @entity3 . RESULTS: Four @entity1 had @entity1149 , 2 @entity1 had @entity14 and 1 @entity1 had @entity1358 . The mean @entity5 volume was 8.7 ml (range: 3.0 approximately 20.7 ml). The prescribed dose of SRT was 30 Gy with 4 fractions for one @entity1 , 18 Gy for two @entity1 and 20 Gy for the other four @entity1 . The four @entity1 who received SRT with a dose of 20 Gy had @entity39 with or without microscopic @entity41 cells. CONCLUSIONS: Early detection of recurrent disease after radiotherapy and identifying radiation-induced @entity3145 are important for delivering adequate treatment. Therefore, specific diagnostic tools that can distinguish @entity39 from progression of metastatic @entity1313 need to be developed.
