Clinical impact of atypical endoscopic features in rectal neuroendocrine tumors

Table 4 Association between endoscopic features and metastasis in rectal neuroendocrine tumors < 10 mm and 10-19 mm in diameter n (%)

	Metastasis (-)	Metastasis (+)	P value
< 10 mm in diameter
Shape			0.155
Sessile	199 (99.0)	2 (1.0)
Semipedunculated	20 (95.2)	1 (4.8)
Surface change			0.005
Smooth	212 (99.1)	2 (0.9)
Depression/erosion	7 (87.5)	1 (12.5)
Color			0.627
Yellow	203 (98.5)	3 (1.5)
Hyperemia	16 (100)	0 (0)
10-19 mm in diameter
Shape			0.548
Sessile	6 (66.7)	3 (33.3)
Semipedunculated	7 (53.8)	6 (46.2)
Surface change
Smooth	10 (76.9)	3 (23.1)	0.041
Depression/erosion	3 (33.3)	6 (66.7)
Color			0.665
Yellow	7 (63.6)	4 (36.4)
Hyperemia	6 (54.5)	5 (45.5)