First described in 1674 by Paul Barbette, intussusception is defined as the telescoping of a proximal segment of the bowel—the intussusceptum into the distal bowel—the intussuscipiens. The cause is idiopathic in most of the cases, while 10–25% of them have a definite lead point. Very rarely, retrograde intussusception can occur, e.g., through gastrojejunostomy. A strong clinical suspicion of the condition followed by an ultrasonographic examination usually clinches the diagnosis. Pneumatic or hydrostatic reduction under image guidence is successful in majority of the patients. Surgical intervention may be occasionally necessary.