year | No. of biopsies | S100 + NSE | Calretinin | AChE |
2007 | 2 | 2 | 0 | 0 |
2008 | 2 | 0 | 0 | 2 |
2009 | 5 | 5 | 1 | 0 |
2010 | 9 | 9 | 8 | 0 |
2011 | 2 | 2 | 2 | 0 |
total: | 20 | 18 | 11 | 2 |