text: Endoscopic<unk>  may be helpful in the diagnosis of VIPoma. Finding on<unk>  suggestive of VIPoma is hypoechoic tumor in the distal part of pancreas.
option_0: VIPoma echocardiography or ultrasound
option_1: VIPoma physical examination
option_2: Warthin's tumor echocardiography or ultrasound
option_3: Warthin's tumor CT
option_4: VIPoma MRI
option_5: VIPoma other diagnostic studies
option_6: Warthin's tumor physical examination
option_7: VIPoma CT