Table 6.
Histologic Type.
| Histologic type | Endoscopic excision | Surgery after endoscopic excision | Surgery | |||||
|---|---|---|---|---|---|---|---|---|
| Number | Percentage | Number | Percentage | Number | Percentage | |||
| Well differentiated | 820 | 83.4 | 417 | 56.8 | 3,934 | 36.1 | ||
| Moderately differentiated | 90 | 9.2 | 176 | 24 | 5,695 | 52.3 | ||
| Poorly differentiated | 2 | 0.2 | 5 | 0.7 | 321 | 2.9 | ||
| Mucinous | 0 | 0 | 4 | 0.5 | 386 | 3.6 | ||
| Signet ring cell | 0 | 0 | 0 | 0 | 30 | 0.3 | ||
| Medullary carcinoma | 0 | 0 | 0 | 0 | 15 | 0.1 | ||
| Adenocarcinoma (NOS) | 0 | 0 | 0 | 0 | 22 | 0.2 | ||
| Squamous cell carcinoma | 0 | 0 | 0 | 0 | 12 | 0.1 | ||
| Neuroendocrine tumor | 24 | 2.4 | 13 | 1.8 | 56 | 0.5 | ||
| Others | 5 | 0.5 | 7 | 0.1 | 43 | 0.4 | ||
| Unknown | 42 | 4.3 | 112 | 15.3 | 370 | 3.8 | ||
| Total | 983 | 100 | 734 | 100 | 10,884 | 100.0 | ||