Infants <3 yr, most <1 yr; 24% of all trauma in children under age 2 yr. Assoc w poverty and low socioeconomic status
Sx:Lethargy, decreased tone, seizures (40-70%), bruises, burns; facial bruises w any nonspecific set of sx under age 3 yr should prompt queries, CT, and skeletal series (Jama 1999;281:621, 657)
Si:Hydrocephalus
Xray:MRI (Peds 2003;112:808); plain films (skeletal survey) for fractures