Objective: Injury and poisoning from metallic mercury has become a rar
e event, Review of the literature and a case report of pediatric metal
lic mercury injury are presented. Design: A case report. Setting: The
Emergency Department at St, Louis Children's Hospital. Patients or par
ticipants: A 15-year-old boy. Interventions: None. Main outcome measur
es: None. Results: The 15-year-old boy fell on a broken mercury thermo
meter. A subcutaneous abscess formed on his left forearm during the ne
xt five days, He had no signs or symptoms of mercury toxicity. His wou
nd was debrided in the operating room and healed completely after seve
ral months. Conclusions: This case shows elemental mercury from a ther
mometer as a potential, if unusual, source of mercury toxicity.