A case of inflammatory pseudotumor arising in the left side of the mandible

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  • HASEBE Mayu
    Department of Oral and Maxillofacial Surgery, School of Dental Medicine, Tsurumi University
  • NAKAOKA Kazutoshi
    Department of Oral and Maxillofacial Surgery, School of Dental Medicine, Tsurumi University
  • YAMADA Hiroyuki
    Department of Oral and Maxillofacial Surgery, School of Dental Medicine, Tsurumi University
  • NAKATANI Yasunori
    Department of Oral and Maxillofacial Surgery, Toshiba Rinkan Hospital
  • KANAI Ikuyo
    Department of Oral and Maxillofacial Surgery, Toshiba Rinkan Hospital
  • HAMADA Yoshiki
    Department of Oral and Maxillofacial Surgery, School of Dental Medicine, Tsurumi University

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Other Title
  • 左側下顎に発生した炎症性偽腫瘍の1例
  • ヒダリガワ カガク ニ ハッセイ シタ エンショウセイ ギ シュヨウ ノ 1レイ

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Abstract

We report a case of inflammatory pseudotumor arising in the mandible that was difficult to differentially diagnoses.<br>A 56 -year-old man visited our clinic because of gingival swelling of the left side of the mandible. Perimandibular inflammation was diagnosed, and the patient underwent incisional drainage and received antibiotics and non-steroidal anti-inflammatory drugs. Transient remission was obtained. Subsequently, however, the gingival swelling rapidly increased, and the left mandibular lateral incisor and second premolar fell out. In additoin, paresthesia of the mental nerve appeared. Although a biopsy suggested that the lesion was an inflammatory pseudotumor, coexistence of a malignant tumor could not be clinically ruled out. Therefore, we decided to perform marginal resection of the left side of the mandible. However, we performed an excisional biopsy because progressive growth of the lesion had gradually subsided. The specimen was consistent with osteomyelitis. The surgical wound healed uneventfully, and no evidence of recurrence has been detected for more than 1 year. Finally, the present case was diagnosed as an inflammatory pseudotumor accompanied by acute mandibular osteomyelitis.

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