口底に認めた脂肪腫の１例

lipoma

北海道歯学会

北海道歯学雑誌

[Introduction] The incidence of lipoma in the oral region is reported to be about 2% of the total. The major sites of occurrence are buccal mucosa, tongue, lips, and gingiva, respectively, and the occurrence on the floor of the mouth is relatively rare. The size of tumor is usually with 2 cm or less . We experienced a lipoma of oral floor in a woman in her 70s with dementia. [Case and course] Her family dentist recommended a detailed examination of the oral floor mass and was referred to our department. She had a mass with 30 × 25 mm diameter on the left oral floor. The superficial mucosa was normal with smooth, well-defined. The mass revealed elastic and soft. The submucosal masss revealed yellowish color. The lesion showed a well-defined low absorption area on CT and a high echo area on US. Due to dementia and mass lesions, her oral hygiene was poor and many residual root teeth were identified. Under the clinical diagnosis of a benign tumor on the floor of the mouth, tumor resection was conducted. The exci sed material was a solid tumor wrapped in a thin capsule. The histopathological diagnosis was lipoma. [Conclusion] The time of growth of this lesion was not clear owing to her medical problem with dementia; however, the growth of the tumor caused poor oral hygiene. Although it depend on each case, we sugget that it is desirable to operate this kind of lipoma as early as possible. Although it depends on the case, it is consider ed desirable to have surger y as early as possible as the cause of deterioration of the oral environment including lipoma.