Symmetric lipomatosis of the tongue presenting as macroglossia: A case report

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  • Mitate Eiji
    Department of Oral and Maxillofacial Surgery, Fukuoka Dental College Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University
  • Kawano Shintaro
    Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University
  • Kiyoshima Tamotsu
    Laboratory of Oral Pathology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University
  • Mikami Yurie
    Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University
  • Goto Yuichi
    Department of Maxillofacial Diagnostic and Surgical Science, Field of Oral and Maxillofacial Rehabilitation, Graduate School of Dental Science, Kagoshima University
  • Kawazu Toshiyuki
    Department of Oral and Maxillofacial Radiology, Faculty of Dental Science, Kyushu University
  • Ikebe Tetsuro
    Department of Oral and Maxillofacial Surgery, Fukuoka Dental College
  • Nakamura Seiji
    Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University

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Other Title
  • 巨舌を呈した舌対称性脂肪腫症の1例

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Abstract

Symmetric lipomatosis of the tongue (SLT) is defined as an infiltrative growth of mature adipose tissues into bilateral tongue muscle. Here, we report a case of SLT presenting as macroglossia and review the literature. The patient was a 71-year-old man who had multiple painless elastic soft masses in the bilateral tongue borders. The patient's tongue was wider than the mandibular dental arch due to the exophytic masses of the tongue, so-called macroglossia. Magnetic resonance imaging revealed poorly marginated masses of the bilateral tongue borders with low signal intensity in T2 fat suppression images and high in both T1 and T2 weighted images. The biopsy specimen was diagnosed as lipoma. Because the tumor masses were located in the bilateral border of the tongue, the patient was diagnosed as SLT.<br>As he had taken anti-coagulant agents for chronic atrial fibrillation, airway obstruction by postoperative bleeding and edema was feared. The debulking operation of the masses was performed twice under general anesthesia. The extirpated specimens showed lesions consisting of mature adipose tissues in muscular layer. No apparent capsule structure was noted.<br>Between 1947 and 2015, 45 cases of benign symmetric lipomatosis, symmetric lipomatosis of the tongue, bilateral lipomatosis of the tongue, and so on were reported. The pathogenesis of SLT is still unknown. No regrowth has been found in the last two years.

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