Table 1.
Reported Japanese cases of early stage colorectal NEC
| Number | Author | Age | Gender | Location | Type | Size (mm) | Depth | Adenoma or adenocarcinoma component | Treatment | ly | v | Reference number |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Okada | 77 | M | Rectum | IIa+IIc | 23 | sm | + | Surgery | + | + | 8 |
| 2 | Kurokawa | 62 | M | Rectum | IIc+IIa | 2.5 | m | − | Surgery | + | − | 9 |
| 3 | Hosaka | 84 | M | Transverse colon | IIa | 12 | sm | + | Polypectomy | − | − | 10 |
| 4 | Suto | 57 | M | Rectum | Isp | 42 | sm | + | Surgery | + | + | 11 |
| 5 | Komatsu | 85 | F | Sigmoid colon | IIa+IIc | 17 | sm | + | Surgery | + | + | 12 |
| 6 | Ikebe | 56 | M | Rectum | Isp | 10 | sm | − | Polypectomy and additional surgery | + | − | 13 |
| 7 | Our case | 56 | M | Transverse colon | IIa+IIc | 11 | sm | + | EMR | − | − |
F, female; ly, lymphatic involvement; M, male; m, mucosa; NEC, neuroendocrine carcinoma; sm, submucosa; v, venous involvement.