Zhang Feng, Xie Zhi-jian, Ge Wei-li, Li Sheng-lai, Li Yi-ning
Department of Oral and Maxillofacial Surgery, Affiliated Stomatological Hospital, Zhejiang University School of Medicine, Hangzhou, PR China.
Med Sci Monit. 2009 Sep;15(9):CS148-50.
A lipoma is a benign tumor which may occur in the adipose tissue of any part of the body. The tumor is most commonly found on the trunk and extremities. Although it is the most common tumor of mesenchymal origin in the head and neck, its incidence is relatively rare. Lipoma of the head and neck is usually located in subcutaneous tissue. It is rarely deep seated with osseous involvement and rarely occurs in children, especially below the age of 10.
The case of a painless mass of one-year history in the right parotidomasseteric region of an eight-year-old boy is presented. The mass was revealed to be a classical lipoma in the masseteric space, possibly causing hyperostosis of the angle of the mandible. After removal of the mass and a spherical protuberance in the angle of the mandible, the boy recovered and no recurrence was noted after one-year follow-up.
Hyperostosis is a rare phenomenon with lipoma. In this case, the hypothesis was posed that the tensile force produced by the lipoma in the masseteric space possibly caused hyperostosis of the angle of the mandible. To the authors' knowledge, a classical lipoma arising from the deep fascial space resulting in osseous change has not been described in the literature before.
脂肪瘤是一种良性肿瘤，可发生于身体任何部位的脂肪组织。该肿瘤最常见于躯干和四肢。尽管它是头颈部最常见的间叶组织来源肿瘤，但其发病率相对较低。头颈部脂肪瘤通常位于皮下组织。它很少深部累及骨骼，且很少发生于儿童，尤其是10岁以下儿童。
本文报告一例8岁男孩右侧腮腺咬肌区有一年无痛性肿物的病例。该肿物经检查为咬肌间隙内典型的脂肪瘤，可能导致下颌角骨质增生。切除肿物及下颌角处的球形突起后，患儿康复，随访一年无复发。
脂肪瘤伴骨质增生较为罕见。在本病例中，推测咬肌间隙内脂肪瘤产生的拉力可能导致下颌角骨质增生。据作者所知，此前文献中尚未描述过起源于深筋膜间隙并导致骨质改变的典型脂肪瘤。
