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[Sciatic paralysis after a buttock intramuscular injection in children: an ongoing risk factor].

Intramuscular injections are regularly recommended for the administration of certain drugs in children. This article underlines the fact that buttock intramuscular injection risks injury to the sciatic nerve, which may lead to lower limb palsy, most often presenting as paralytic drop foot. This condition rarely results from direct traumatic lesion of the sciatic nerve, but usually from the caustic effect of the injected drug. It may occur in older children and adolescents, as well as in infants and younger children. Therefore, the buttocks should not be used as an intramuscular injection site in children whatever their age. In the case of sciatic nerve injury following intramuscular injection, extrafascicular neurolysis may prevent the occurrence of paralysis.