Table 3.

Mode of NTS diagnosis.

CT	FDG-PET	UGE	EUS	CA19-9 Increase	UGE Findings	EUS Findings
NE	NE	NE	NE	NE	NE	NE
NE	NE	NE	NE	NE	NE	NE
DA	NE	DA	DA	DA	No ulcers found, and the gastric mucosal surface was normal	We observed a mass inside the stomach wall (diameter 3 cm); the mass extended from the proper muscular layer to the retroperitoneal space
NDA	NE	DA	DA	NE	Well demarcated protrusion (approximately 4 mm in diameter) in the middle part of the esophagus	A hypoechoic region (diameter 8 mm) inside the esophageal wall
DA	DA	DA	DA	NE	Appearance of irregular gastritis, differing from typical gastric cancer	A hypoechoic region, primarily in the proper muscular layer, extending from the mucosal layer to the serous membrane
NDA	DA	DA	DA	DA	Linear mass (4 cm long) on the greater curvature side of the posterior wall of the gastric body	A hypoechoic mass was observed close to the resected pancreatic region, associated with the swelling of surrounding lymph nodes
DA	NE	DA	NE	NE	SMT-like mass in the posterior wall of the upper gastric body	NE
NE	NE	DA	DA	NE	Linear ulcer at the esophagogastric junction	A hypoechoic mass (1 cm in diameter) in the submucosal layer
NE	NE	DA	DA	NE	Wall thickening in the gastric antral region (details unknown)	Wall thickening in the gastric antral region (details unknown)
NE	NE	DA	NE	NE	Recurrent signs in the stomach wall (details unknown)	NE
DA	NE	DA	NE	NE	SMT-like mass in the posterior wall of the gastric body	NE
DA	DA	DA	DA	NDA	SMT-like mass in the posterior wall of the gastric body	A hypoechoic region with cystic lesions
NDA	DA	DA	DA	NE	SMT-like mass (diameter 12 mm) in the posterior wall of the gastric body	An internally heterogeneous hypoechoic mass located primarily in the submucosal layer
NE	NE	DA	NE	NE	3 cm mass with an ulcer in the posterior wall of the gastric body	NE
NE	DA	DA	NE	NE	SMT-like mass in the posterior wall of the gastric body	NE
DA	NE	DA	DA	NE	SMT-like mass in the posterior wall of the gastric body	anechoic region (diameter 24 mm) located primarily in the submucosal layer
NE	DA	DA	DA	NE	SMT-like mass (25 mm in diameter) in the posterior wall of the lower gastric body	Mass extending from the submucosal layer to the proper muscular layer
DA	NE	DA	NE	NE	Ulcerous mass (50 mm in diameter) outside the posterior wall of the cardiac region of the stomach	NE
DA	DA	DA	DA	NE	SMT-like mass, 20 mm in diameter, with irregular mucosa in the posterior wall of the upper gastric body	A hypoechoic mass (diameter 20 mm) located in the submucosal layer
DA	NE	NE	DA	NE	NE	A hypoechoic region extending from the serous membrane to the pancreatic tumor
NE	NE	NE	NE	NE	NE	NE
NE	NE	NE	NE	NE	NE	NE
DA	NE	DA	DA	NE	SMT-like mass in the posterior wall of the gastric body	A hypoechoic mass extending from the submucosal layer to the proper muscular layer
DA	NE	DA	DA	NE	SMT-like mass in the posterior wall of the gastric body	A hypoechoic mass extending from the submucosal layer to the proper muscular layer
NE	DA	DA	NE	DA	Ulcerous protrusion with hemorrhage in the posterior wall of the gastric body	NE
DA	NE	DA	DA	DA	SMT-like mass, 10 mm in diameter, in the posterior wall of the gastric body	A hypoechoic mass in the submucosal layer
DA	DA	DA	NE	NDA	Protruding lesion in the posterior wall of the gastric body	NE
DA	NE	NE	NE	DA	NE	NE

CT; Computed Tomography, EUS; Endoscopic ultrasound, FDG-PET; FluoroDeoxyGlucose-Positron Emission Tomography, NE; Not Entered, UGE; Upper Gastrointestinal Endoscopy, DA; Detection of Abnormality, NDA; No Detection of Abnormality.