All statements about adult intussusception are true except:

Intussusception In Adults Bailey says " Adult cases of intussusception are invariably associated with a lead point, which is usually a polyp (e.g., Preutz-jegher&;s syndrome), a submucosal lipoma or other tumor " In adults , colonic intussusception is common but in children, ileocolic is the most commonest variety (77%) Ref: Bailey 27th edition Pgno: 1287