Diagnostic accuracy of endoscopic ultrasonography for rectal neuroendocrine neoplasms

Table 1 Endoscopic ultrasonography diagnosis and pathologic results in 67 cases of subepithelial lesions

EUS diagnosis	Pathologic diagnosis		Total
	NEN	Non-NEN
NEN	34	8	42
Non-NEN	2	23	25
Total	36	31	67

EUS: Endoscopic ultrasonography; NEN: Neuroendocrine neoplasm.

Table 2 Endoscopic ultrasonography manifestations of 8 rectal subepithelial lesions misdiagnosed as neuroendocrine neoplasms

Case	Pathology result	EUS features
		Layer	Size (mm)	Shape	Border	Echogenicity	Homogeneity
1	Stromal tumor	3rd	8	Round	Distinct	Hypoechoic	Homogenous
2	Endometriosis	Full-thickness	35	Irregular	Blurry	Hypoechoic	Heterogeneous
3	Inflammatory node	3rd	5	Nodous	Blurry	Hyperecho	Heterogeneous
4	Inflammatory lesion	3rd	20	Spindle	Blurry	Hyperecho	Heterogeneous
5	Metastatic carcinoma	3rd-4th-5th	12	Round	Blurry	Hypoechoic	Heterogeneous
6	Lymphoma	2nd-3rd-4th	6	Spindle	Blurry	hypoechoic	Heterogeneous
7	Neurilemmoma	2nd-3rd-4th	34	Round	Distinct	Intermediate	Heterogeneous
8	Hemangioma	3rd	9	Oval	Distinct	Hyperecho	Honeycomb

EUS: Endoscopic ultrasonography.