The intussusception is one of the most frequent causes of occlusive syndrome in infants and in children. 1 The mesenteric lymphadenopathy, wich is very rare post rotavirus vaccination, can cause intussusception, 2-5 especially in genetically predisposed individuals. 6 There is an association between intussusception and some classes of genotype. 7-9 Two infants aged 3 months, vaccinated against rotavirus. After about a week, one of the 2 identical infants presented inconsolable crying, vomiting, loose stools mixed ...