Table 1.

Previously Reported Cases of Gangliocytric Paraganglioma Located in the Minor Papilla

Study	Age/Sex	Symptom	Size	EUS findings	Treatment	Clinical course
Matsubayashi et al. (2017) [7]	71/M	No symptoms	17 mm	Homogeneously low echogenicity in the submucosa	Open transduodenal polypectomy	No recurrence 5 years after surgery
Choi et al. (2007) [8]	58/M	Not available	8 mm	Hypoechoic lesion in the submucosa	Endoscopic resection	Scar change with no residual tumor on 1-month follow-up endoscopy
Loew et al. (2007) [9]	66/M	Abdominal pain	15×18 mm	Polypoid, hypoechoic mass	Endoscopic resection	1-month follow-up ercp without residual tumor, asymptomatic at 2-year follow-up
Nakamura et al. (2002) [10]	66/M	Epigastric pain	12×10 mm	Inhomogeneous mass with hyperechoic and hypoechoic areas in the submucosa	Endoscopic resection	No residual tumor was detected on biopsy from the resection site on 1-year follow-up endoscopy

ERCP, endoscopic retrograde cholangiopancreatography; EUS, endoscopic ultrasound.