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Immunohistochemical Study
| Case | HMB-45 | Actin | S-100 | Cytokeratin | Vimentin | c-kit |
|---|---|---|---|---|---|---|
| 1 | ++ | − | ++ | − | − | + |
| 2 | ++ | ++ | + | − | + | + |
| 3 | ++ | − | ++ | − | + | − |
| 4 | ++ | ++ | − | − | + | − |
| 5 | ++ | |||||
| 6 | ++ | + | ++ | − | + | − |
| 7 | ++ | − | ++ | − | + | − |
| 8 | ++ | − | − | − | + | − |
| 9 | ++ | − | ++ | − | − | − |
| 10 | ++ | + | + | − | + | + |
++: strongly staining, >30% positivity; +: weakly staining, 10∼30% positivity; − no staining, or <10% positivity
