A case of traumatic neuroma of the lower lip

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  • ISHII Yoshimasa
    Department of Dentistry/Oral and Maxillofacial surgery, Ebina General Hospital
  • KUDOU Masanori
    Department of Dentistry/Oral and Maxillofacial surgery, Ebina General Hospital
  • HAMASAKI Ken
    Department of Dentistry/Oral and Maxillofacial surgery, Ebina General Hospital
  • SUZUKI Kumiko
    Department of Dentistry/Oral and Maxillofacial surgery, Ebina General Hospital
  • ARAI Hiroyuki
    Department of Dentistry/Oral and Maxillofacial surgery, Ebina General Hospital
  • SATO Yuho
    Department of Dentistry/Oral and Maxillofacial surgery, Ebina General Hospital

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Other Title
  • 下唇に発生した外傷性神経腫の１例
  • カシン ニ ハッセイシタ ガイショウセイ シンケイシュ ノ 1レイ

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Abstract

Traumatic neuroma is a hyperplastic lesion caused by the superfluous regeneration of nerve cells at acut surface. We report a case of traumatic neuroma arising in the lower lip of a 7-year-old boy. The patient wasinvolved in a traffic accident in May 2003, causing a bone fracture of the femoral region and laceration of the lowerlip. The lower lip was sutured surgically. Shortly after treatment, the patient noticed a swelling in the right side ofhis lower lip and consulted our clinic for a detailed examination on January 7, 2004. Macroscopically, an elasticand hemispheric painless soft mass with a diameter of 1.0cm was noticed at the suture line. Under a clinical diagnosisof mucocele, we performed enucleation of the tumor. Histologically, irregular proliferation of the peripheralnerve cells and nodular formation of Schwann cells were observed. The tumor was diagnosed to be a traumaticneuroma. During 2 years of postoperative follow-up, the patient has had no evidence of recurrence.

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