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| Patients | Age | Gender | Indication | Size of the lesion (mm) | Urine 5-HIAA (0–14 mg\gCR) | Chromogranin (0–95 ng\ml) | Imaging | Surgery | Pathology | Follow-up notes |
| Initial | Follow up | Initial | Follow up |
|
| Case 1 | 66 | Male | Surveillance: personal history of colon polyp. | 20 | 3 mg/gCR | 3 mg/gCR | 7 ng/ml | 40 ng/ml | CT scan: mass in the TI. No findings to suggest metastatic disease | Laparoscopic, switched to mini-laparotomy right hemicolectomy | Low-grade (NET G1) T2N1M0 stage III | Colonoscopy in 2 years: normal neo-ileum |
| Case 2 | 57 | Female | Average risk screening colonoscopy | 11 | 4 mg/gCR | 2.4 mg/gCR | 101 ng/ml | 99 ng/ml | CT scan: mesenteric nodule measuring 9 mm adjacent to the TI | Laparoscopic right hemicolectomy | Low-grade (NET G1) T2N1M0 stage III | Colonoscopy in 1 and 3 years: normal neo-ileum |
| Case 3 | 57 | Male | Average risk screening colonoscopy | 15 | NA | 2 mg/gCR | NA | 62 ng/ml | CT scan: faint enhancement within the TI. No findings to suggest metastatic disease | Laparoscopic ileocolectomy | Low-grade (NET G1) T4N1M0 stage III | Colonoscopy in 1 and 4 years: normal neo-ileum |
| Case 4 | 69 | Female | Average risk screening colonoscopy | 20 | NA | 3 mg/gCR | 48 | 70 ng/ml | CT scan: 10 mm lobulated excrescence involving TI. No findings to suggest metastatic disease | Laparoscopic right colectomy with ileocolic anastomosis | Low-grade (NET G1) T1N1M0 stage III | Colonoscopy in 2 years: normal neo-ileum |
| Case 5 | 55 | Female | Surveillance: personal history of colon polyp | 10 | 3 mg/gCR | NA | 1152 ng/ml | 1160 ng/ml | CT scan and NM tumor localization: no findings to suggest metastatic disease | Laparoscopic right hemicolectomy | Low-grade (NET G1) T1N1M0 stage III | Colonoscopy in 1 year: normal neo-ileum. |
| Case 6 | 64 | Male | Average risk screening colonoscopy | 10 | NA | NA | NA | NA | CT scan: no findings to suggest metastatic disease | Laparoscopic right hemicolectomy | Low-grade (NET G1) T1N1M0 stage III | No follow-up colonoscopy |
| Case 7 | 60 | Female | Average risk screening colonoscopy | 17 | 2 mg/gCR | 4 mg/gCR | 559 ng/ml | 149 ng/ml | CT scan: no findings to suggest metastatic disease | Robotic-assisted ileocolectomy | Low-grade (NET G1) T2N0M0 stage II | Colonoscopy in 1 year: normal neo-ileum |
| Case 8 | 58 | Female | Average risk screening colonoscopy | 6 | NA | NA | 48 ng/ml | 56 ng/ml | CT scan and NM tumor localization: a 1.1 cm lesion within the TI. No findings to suggest metastatic disease | Open right hemicolectomy | Low-grade (NET G1) T3N0M0 stage II | Colonoscopy in 1 year: normal neo-ileum |
| Case 9 | 69 | Male | Surveillance: due to piecemeal polypectomy | 15 | 6 mg/gCR | NA | 531 ng\ml | NA | CT chest and enterography: RLQ tumor with peritoneal and omental metastasis | Laparoscopic-assisted right hemicolectomy | Low-grade (NET G1) T4N1M1 stage IV | No follow-up colonoscopy |
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