Table 1.
Expression of immunohistochemistry in various regions of the tumor
| Classic SP | Columnar clear cell area | Short spindle solid cell nests | ||
|---|---|---|---|---|
|
| ||||
| Cuboidal surface cells | Stromal small round cells | |||
| TTF-1 | +++ | ++ | +++ | + |
| CK | +++ | - | +++ | + |
| CK8/18 | +++ | - | +++ | + |
| Vimentin | - | ++ | - | - |
| EMA | ++ | + | + | - |
| CEA | - | - | - | - |
| CgA | - | - | - | +++ |
| Syn | - | - | - | +++ |
| CD68 | - | - | - | - |
| S-100 | - | - | - | - |
| HMB45 | - | - | - | - |
| ER | Partially + | Partially + | Scattered + | Scattered + |
| PR | Scattered + | Partially + | - | Partially + |
| P53 | Scattered + | Scattered + | Scattered + | Scattered + |
| TFE3 | - | - | - | - |
| Ki67 index | <1% | <1% | <2% | <1% |