Wireless capsule endoscopy is done to visualize which of the following condition?
Esophageal varices
Gastric carcinoma
Crohn's disease
Ulcerative colitis
Crohn's disease Wireless capsule endoscopy (WCE) allows direct visualization of the entire small-bowel mucosa. The diagnostic yield of detecting lesions suggestive of active CD is higher with WCE than CT enterography or small-bowel series. WCE cannot be used in the setting of a small-bowel stricture. Capsule retention occurs in <1 % of patients with suspected CD, but retention rates of 4--6% are seen in patients with established CD.