Giant Cell Fibroblastoma
Supplemental Studies
Immunohistology
| CD34 | Nearly 100%, may be weak |
| CD31 | Negative |
| Actin | Negative except for myoid whorls |
| Keratin | Negative |
| S100 | Negative |
| Desmin | Negative |
Genetic studies
t(17;22) with fusion of COL1A1 and PDGFB
| CD34 | Nearly 100%, may be weak |
| CD31 | Negative |
| Actin | Negative except for myoid whorls |
| Keratin | Negative |
| S100 | Negative |
| Desmin | Negative |
t(17;22) with fusion of COL1A1 and PDGFB