Dermatofibrosarcoma Protuberans
Supplemental Studies
Immunohistology
| CD34 | Nearly 100%, extensive staining |
| Apolipoprotein D | 90% |
| Factor XIIIa | 75% but weak and focal |
| Actin | Variable |
| Keratin | Negative |
| S100 | Negative |
| Desmin | Negative |
Genetic studies
t(17;22) with fusion of COL1A1 and PDGFB in all cases tested
