【摘要】 目的：利用螺旋CT(SCT)和锥形束CT(CBCT)分析18例牙源性黏液瘤（OM）的三维影像学特点，以帮助在临床上对OM进行诊断与鉴别诊断。方法：收集有完整临床资料、病理诊断及SCT或CBCT影像的OM病例18例，结合临床与病理表现，分析其三维影像学特点，包括病变位置、大小、膨隆情况及房室分隔情况等。根据病变内房室分隔特点，将病变分型。结果：18例患者，男性8例，女性10例，年龄9～39岁；其中12例（66.7%）为类圆形；8例（44.4%）位于下颌骨后部，7例（38.9%）位于上颌骨后部。14例（77.8%）病变有细直锐利的房室分隔，包括4例房隔位于瘤内边缘（边缘分隔型）、4例房隔自病变周缘向中心汇聚（向心型）及6例房隔在瘤内交织呈网状（网格型）；余4例（22.2%）未见分隔（单房型）。另外，11例（61.1%）病变唇/颊侧骨质膨隆，12例（66.7%）舌/腭侧骨质膨隆；14例（77.8%）存在骨皮质不连续；8例(44.4%)有牙根吸收。结论：OM好发于颌骨后部，多房者多见，瘤体可突破骨皮质。根据瘤内房室分隔特点，可将其分为4型：单房型、边缘分隔型、向心型及网格型。更多还原

【Abstract】 Objective: To analyze the there-dimensional radiographic characteristics of odontogenic myxoma(OM). Methods: Clinical records, histopathological reports, SCT or CBCT images of 18 patients with OM were retrospectively collected, and radiographic features including lesion site, shape, size, expansion, intralesional septa and relationship with surrounding tissues were analyzed. The lesions were classified into types by the forms of septa. Results: 18 patients(8 males and 10 females, aged 9-39 years old) were included. Among them, 12 lesions(66.7%) were round-like in shape, 7(38.9%) were located in the posterior maxilla, and 8(44.4%) in the posterior mandible. According to the septa map, the lesions included 4(22.2%) without septum(unilocular type), 4 with(22.2%) sporadic septum on the periphery of the tumor(peripheral type), 4(22.2%) with the septum from the periphery towards the center of the tumor(centripetal type) and 6(16.7%) with multiple septa interwoven as grid-like trabeclations(criss-crossing tup). Labial/buccal cortex expansion was present in 11 lesions(61.1%), and palatal cortex expansion in 12 lesions(66.7%). Moreover, cortex discontinuity occurred in 14 lesions(77.8%), impacted tooth was present in 9 lesions(16.7%), and root resorption was present in 8 lesions(44.4%). Conclusion: Most OMs occur in the posterior jaw, with multilocular and discontinued cortex. OMs can be classified into unilocular, perpheral, centripetal and cirss-crossing type by the forms of septa in the lesion.更多还原