Gastroblastoma
Differential Diagnosis
| Gastroblastoma | Carcinosarcoma |
| Young adults | Generally older patients |
| Cytologically bland | Malignant epithelial and stromal elements |
| Gastroblastoma | Gastric Synovial Sarcoma |
| Components may be indistinct | Components generally distinct |
| FISH negative for SS18 abnormalities | FISH shows evidence of SS18 rearrangement |
| Gastroblastoma | Gastric Teratoma |
| Young adults | Generally infants |
| Only two components | Multiple tissue types |
| Gastroblastoma | Mesothelioma |
| Negative for CK5/6 and calretinin | CK5/6 and calretinin positive |
| Not serosal based | Based in serosa |
