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| Characteristic | Glomus tumor | Carcinoid tumor | Hemangiopericytoma |
|---|---|---|---|
| SMA | (+) | (−) | (−) |
| VIM | (+) | (−) | (+) |
| CD34 | (−) | (−) | (+) |
| CK | (−) | (+) | (−) |
| Neuroendocrine | (−) | (+) | (−) |
SMA, smooth muscle actin; VIM, vimentin; CK, cytokeratin.
