Table 2.
Immunohistochemistry and Mutations in the primary omental GISTs
| Case No. | Histology | Immunohistochemistry | Mutations | |||||
| KIT | CD34 | S100 | SMA | Desmin | Gene | Site | ||
| 15 | Spindle | Positive | + | - | - | - | C-kit | Exon11, MS |
| 16 | Spindle | Positive | + | - | - | - | C-kit | Exon11, IFD |
| 17 | Spindle | Positive | + | - | - | - | C-kit | Exon11, MS |
| 18 | Spindle | Positive | + | - | - | - | C-kit | Exon11, MS |
| 19 | Spindle | Positive | + | - | Weak | - | C-kit | Exon11, IFD |
| 22 | Myxoid epithelioid | Weak | + | - | + | - | PDGFRA | Exon18 del D842V |
| 23 | Epithelioid | Weak | - | - | - | - | PDGFRA | Exon18 DIMH842-845 |
| 26 | Epithelioid | Weak | + | NA | NA | NA | PDGFRA | Exon18 |
| 28 | Myxoid epithelioid | Weak | + | - | - | - | PDGFRA | Exon12, V561D |
MS: miss sense, IFD: in-frame deletion, NA: not available