CD Crohn’s disease CT Computed tomography ERCP Endoscopic retrograde cholangiopancreatography FAPS Functional abdominal pain syndrome GI Gastrointestinal IBD Infl ammatory bowel disease IBS Irritable bowel syndrome UC Ulcerative colitis US Ultrasound

Chronic abdominal pain is a commonly seen complaint by primary care physicians, gastroenterologists, and pain physicians. Generally, it is defi ned as continuous or intermittent abdominal discomfort for at least 6 months, and can be caused by a wide variety of etiologies ranging from organic to functional. Organic causes can be anatomical, physiological, metabolical, or can arise from the abdominal wall musculature, fascia, or nerves. Functional abdominal pain is a more challenging problem and can be diffi cult to diagnose and manage. In patients with functional abdominal pain, frequently, there is no clear organic cause that can explain the underlying symptoms. Epidemiology