[An investigation on injectional gluteal muscle contracture in childhood in Mianyang City].

An investigation of 9845 healthy children with age of 3-12 years in Mianyang urban area has been made by us. One hundred and twenty-two cases of injectional gluteal muscle contracture were diagnosed. The morbidity is 1.36% and it is more common in boys than in girls (OR: 3.71). The prevalence rate of the age group from 4 to 7 is highest and it decreases markedly with aging. This is probably due to self-recovery of some mild cases. Repeating injections of diluted penicillin by 1.5-2% Benzyl alcohol are the predominant causative factor of the disease. If Benzyl alcohol as a solvent for penicillin in children was no longer using, it would possibly reduce the morbidity. Up to now, this is a common iatrogenic disease in pediatric population and special attention should be paid to it.