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Immunohistochemistry of neuroendocrine tumors
| Histopathology | TTF1 | Napsin-A | Chromogranin | Synaptophysin | CD56 | p-40 | Ki67 (mean) (%) |
|---|---|---|---|---|---|---|---|
| Typical carcinoid (n=16) | 0/7 | 0/1 | 12/12 | 7/7 | 0/2 | 1.4 | |
| Atypical carcinoid (n=5) | 2/3 | 0/1 | 4/5 | 3/3 | 1/1 | 6.6 | |
| Small cell lung carcinoma (n=31) | 23/27 | 0/16 | 19/25 | 23/24 | 7/8 | 0/18 | 53.9 |
| Combined small cell carcinoma | 1/1 | 0/1 | 1/1 | 1/1 | 1/1 | - |
