Incidence of metastases related to the size of the primary gastroenteropancreatic neuroendocrine tumor

Tumor location and size, cm	Total patient numbers	Nodal metastases, number of patients (%)	Distant metastases, number of patients (%)
Small intestine
≤1	43	5 (12)	2 (5)
1.1 to 1.9	83	58 (70)	16 (19)
≥2	59	50 (85)	28 (47)
Appendix
≤1	431	0	0
1.1 to 1.9	53	4 (7.5)	2 (4)
≥2	33	11 (33)	4 (12)
Colon
<2	11	2	2
≥2	42	26 (62)	17 (40)

Reproduced with permission from: Rorstad O. Prognostic indicators for carcinoid neuroendocrine tumors of the gastrointestinal tract. J Surg Oncol 2005; 89:151. Copyright © 2005 Wiley-Liss. Permission from John Wiley & Sons.

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