First rib fractures in abused infants: a report of three cases.

The authors describe 4 first rib fractures in 3 infants, highlighting the difficulty in detecting first rib fractures on skeletal survey. All 4 fractures were the result of physical abuse. A literature search does not find a case of first rib fracture in a healthy infant that is not the result of child abuse. The diagnosis of first rib fracture in an infant should prompt a thorough medical and social evaluation for child abuse.