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Penetrating head injuries are rare, but can cause severe morbidity in children. In particular, penetrating head trauma with a wooden foreign body is considered to be likely to cause central nervous system infections because of its porosity and softness. However, actually confirming minute contaminations, such as skin debris or hair, in the brain parenchyma is rare. We report the case of a 2-year-old boy who presented with a penetrating head injury by a chopstick. During surgical removal of the chopstick, intraparenchymal hair contamination was confirmed under a surgical microscope. The postoperative course of the patient was uneventful. After 13 months of follow-up without any infectious events, the patient remains well and asymptomatic. The findings in the present case demonstrate that in the case of a penetrating head trauma with a wooden foreign body, surgical removal and active debridement should be the treatment of first choice. [ABSTRACT FROM AUTHOR]