A 17-month-old boy was evaluated for a midline mass on his chin. The mass was anchored to the mentalis muscle with a stalk-like structure. The pathological diagnosis of the mass was rhabdomyomatous mesenchymal hamartoma. This is the first report of rhabdomyomatous mesenchymal hamartoma presenting as a midline chin mass in Korean pediatric patients.
Keywords: Hamartoma; Head and neck neoplasms; Mandibular neoplasms; Rhabdomyoma; Soft tissue neoplasms.