Table 2.
Immunohistochemistry results of pulmonary carcinoids.
| Clinical factors | Total | Typical carcinoid | Atypical carcinoid | P value | |||
|---|---|---|---|---|---|---|---|
| No. | % | No. | % | No. | % | ||
| CD56 | 0.607 | ||||||
| Negative | 4 | 7.0 | 2 | 5.4 | 2 | 10.0 | |
| Positive | 53 | 93.0 | 35 | 94.6 | 18 | 90.0 | |
| TTF-1 | 0.651 | ||||||
| Negative | 39 | 66.1 | 25 | 64.1 | 14 | 70.0 | |
| Positive | 20 | 33.9 | 14 | 35.9 | 6 | 30.0 | |
| SYN | 1.000 | ||||||
| Negative | 1 | 1.7 | 1 | 2.6 | 0 | 0.0 | |
| Positive | 58 | 98.3 | 38 | 97.4 | 20 | 100.0 | |
| CgA | 1.000 | ||||||
| Negative | 2 | 9.1 | 1 | 12.5 | 1 | 0.0 | |
| Positive | 56 | 90.9 | 38 | 87.5 | 18 | 100.0 | |
| S-100 | 0.282 | ||||||
| Negative | 7 | 46.7 | 4 | 36.4 | 3 | 75.0 | |
| Positive | 8 | 53.3 | 7 | 63.6 | 1 | 25.0 | |
| INSM1 | 0.316 | ||||||
| Negative | 1 | 5.3 | 0 | 0.0 | 1 | 16.7 | |
| Positive | 18 | 94.7 | 13 | 100.0 | 5 | 83.3 | |
| KI67 | <0.001 | ||||||
| <5% | 44 | 80.0 | 35 | 94.6 | 9 | 50.0 | |
| ≥5% | 11 | 20.0 | 2 | 5.4 | 9 | 50.0 | |