A case of intramuscular lipoma extending to the infratemporal fossa that was associated with mental nerve neuropathy as an initial symptom

DOI Web Site 48 References
  • FUKUI Yasuto
    Department of Molecular Oral Medicine and Maxillofacial Surgery, Division of Frontier Medical Science, Graduate School of Biomedical Science, Hiroshima University
  • TORATANI Shigeaki
    Clinic of Oral and Maxillofacial Surgery, Hiroshima University Hospital
  • KOIZUMI Koichi
    Department of Molecular Oral Medicine and Maxillofacial Surgery, Division of Frontier Medical Science, Graduate School of Biomedical Science, Hiroshima University
  • MATSUMOTO Shinji
    Department of Molecular Oral Medicine and Maxillofacial Surgery, Division of Frontier Medical Science, Graduate School of Biomedical Science, Hiroshima University
  • HAYASHIDO Yasutaka
    Clinic of Oral and Maxillofacial Surgery, Hiroshima University Hospital
  • OKAMOTO Tetsuji
    Department of Molecular Oral Medicine and Maxillofacial Surgery, Division of Frontier Medical Science, Graduate School of Biomedical Science, Hiroshima University Clinic of Oral and Maxillofacial Surgery, Hiroshima University Hospital

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Other Title
  • オトガイ部知覚異常を初発症状とした側頭下窩に進展した筋肉内脂肪腫の1例
  • オトガイブ チカク イジョウ オ ショハツ ショウジョウ ト シタ ソクトウ カカ ニ シンテン シタ キンニク ナイ シボウ シュ ノ 1レイ

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An intramuscular lipoma is a deep-seated heterotopic benign mesenchymal tumor that originates in a skeletal muscle and infiltrates the adjacent muscle. It tends to recur after excision. This tumor is also referred to as “infiltrating lipoma" and differential diagnosis from well-differentiated liposarcoma is necessary.<br>Intramuscular lipoma is very rare in the oral and maxillofacial region. We describe a case of intramuscular lipoma occurring in the musculus pterygoideus medialis or lateralis that spread to the infratemporal fossa in association with mental nerve neuropathy in a 59-year-old man. With the patient under general anesthesia, we excised the tumor, including the circumferential tissue. At the 2.5-year postoperative evaluation, numbness had improved, with no evidence of recurrence.

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