Table 1.
Distribution of grade changes.
| Primary tumor | Grade 1 | Grade 2 | Grade 3 | n | |
|---|---|---|---|---|---|
| Recurrent tumor | |||||
| Grade 1 | 2 | 3 | 1 | n = 6 | |
| Grade 2 | 6 | 9 | 12 | n = 27 | |
| Grade 3 | 1 | 2 | 13 | n = 16 | |
| n | n = 9 | n = 14 | n = 26 | n = 49 | |
: Improving group 
: Stable group 
: Worsening group.
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