<unk>  tests used in the diagnosis of VIPoma include serum vasoactive intestinal polypeptide (VIP) levels, basal gastric acid output, and CMP for potassium, bicarbonate, magnesium, and calcium levels.
VIPoma laboratory findings
VIPoma physical examination
VIPoma other imaging findings
Ependymoma physical examination
Ganglioglioma physical examination
VIPoma other diagnostic studies
VIPoma echocardiography or ultrasound
VIPoma MRI