Vascular malformations occur due to errors during vasculogenesis. The incidence of vascular malformations in the jawbone is reportedly rare. A diagnosis of vascular malformations in the jawbone is often difficult, and treatment requires precise identification of the location and extension of the tumor. We describe our experience with a case of mandibular capillary malformation in a 12-year-old girl. The patient was experiencing right side mental nerve desensitization and referred to our hospital. The clinical diagnosis at the first visit was a right mandible tumor. Although a biopsy was performed with the patient under general anesthesia, there was pulsatile bleeding in the mandible, and sampling was difficult. Arteriovenous malformation was suspected from the angiographic findings, and surgery after embolization was planned. Embolization of the facial artery, maxillary artery, and transverse facial artery was performed. Mandibular segmental resection and a vascularized iliac bone graft were performed after 2 days of embolization. A histopathologic diagnosis of capillary malformation was made. As of 1 year and 9 months after surgery, there is no recurrence with good aesthetics.
