摘要
目的:回顾性分析下颌骨牙源性肿瘤及肿瘤样病变的CT表现,旨在提高对此类病变的诊断及鉴别诊断水平。方法:收集经手术病理证实的下颌骨牙源性肿瘤及肿瘤样病变共44例,分析各类病变的影像学特点。结果:成釉细胞瘤14例,其中9例单囊者CT表现为边缘规则的局部骨质膨胀性病变,以向唇颊侧膨胀为主,5例多囊/实性者呈多房分隔,实性部分有强化。牙源性角化囊性瘤7例,主要表现为沿着下颌骨长轴生长的长椭圆形低密度影。恶性者牙龈癌4例,表现为边缘不规则的骨质破坏,病变密度不均,伴有邻近软组织肿块。牙源性纤维瘤和牙源性囊性钙化瘤各1例。肿瘤样病变17例,其中含牙囊肿9例,CT主要表现为内含牙,以牙冠侧为中心围绕着冠根交界处形成的类圆形低密度囊肿。根端囊肿4例,骨化性纤维瘤1例,骨性纤维结构不良2例,孤立性骨囊肿1例。结论:牙源性肿瘤及肿瘤样病变有不同的影像特点,CT检查对下颌骨各类病变的诊断和鉴别诊断有重要意义。
Objective： To study the CT features of edontogenic tumor and tumor-like lesions in submaxilla so as to improve the diagnostic level of this disease. Methods： CT appearances of mandibular odontogenic tumor and tumor-llke lesions proved by surgery and pathology in 44 patients were reviewed retrospectively. Results：27 cases were edontogenic tumors. Among them, 14 cases were ameloblastomas, 12 of 14 them located in lower molar and ascending limb region, with 6 eases mono-cystic type and, the others multi-cystic or solid type. Mono-cystie type of ameloblastoma showed regular expansive bony disease. The muhi-eystie or solid type showed multi-cystic expansive bony disease with septation, sometimes bony destruction and enhaneement. 7 eases of keratoeystie odontogenie tumor showed cystic density and growth along the long axis of the body of submaxilla. 4 eases of carcinoma of gingiva showed irregular destruction of bone with soft- tissue mass. 17 cases were tumor-like lesions, ineluding 9 eases dentigerous cysts, 4 eases radieular cysts, 1 ease ossifying fibroma, 2 ease osteofibrous dysplasia, and 1 ease solitary bone cyst. Conelusion：Tumor and tumor-like lesions in submaxilla have different CT features. CT sean plays an important role in diagnosis and differential diagnosis.
出处
《医学影像学杂志》
2009年第2期209-212,共4页
Journal of Medical Imaging
