Table 2.
Disorders That Mimic Cyclic Vomiting Syndrome in Adults
| Gastrointestinal disorders | Typical evaluation |
|---|---|
| Gastric disorders | |
| Peptic ulcer disease | Upper endoscopy |
| Gastroparesis | Gastric emptying scan |
| Gallbladder disorders | |
| Cholecystitis | Abdominal ultrasound |
| Biliary tract dysmotility | HIDA scintigraphic imaging |
| Small bowel disorders | |
| Intermittent small bowel obstruction | CT enterography |
| Chronic intestinal pseudo-obstruction | Abdominal obstruction radiographic series |
| Malrotation with volvulus | Upper GI with small bowel follow-through |
| Other | |
| Abdominal migraine | Similar to CVS |
| Extra-intestinal disorders | |
| Central nervous system abnormalities | |
| Mass | Head MRI |
| Hydrocephalus | Head MRI |
| Renal Disorders | |
| Nephrolithiasis | Urinalysis |
| Ureteropelvic junction obstruction | Renal ultrasound |
| Hormonal and metabolic disorders | |
| Adrenocorticoid insufficiency | Plasma cortisol |
| Acute intermittent porphyria | Urinary porphyrins |
| Other | |
| Chronic cannabis use | Response to cessation of cannabis use |
| Psychogenic vomiting | Psychiatric evaluation |
Source: Adapted from Ref 2