Gastrointestinal Tract Leiomyosarcoma
Supplemental Studies
Immunohistology
| Smooth muscle actin | 100% |
| Desmin | 50-60% |
| CD117 | 0% |
| CD34 | Rare* |
| S100 | 0% |
| GFAP | 0% |
*one CD34 positive case reported
Genetic Studies
- All leiomyosarcomas tested show no evidence of mutation in KIT
