鼻前庭囊肿HRCT诊断

High-resolution CT diagnosis of the nasal vestibular cyst

目的 :探讨鼻前庭囊肿的HRCT表现 ,评价HRCT的诊断价值。方法 :回顾性分析 2 0例经手术病理证实的鼻前庭囊肿 ,均经过HRCT检查。结果 :发病部位 :左侧 8例 ,右侧 7例 ,双侧 5例。病灶形态多变 ,其中 1 4例呈类圆形 ;最小病灶 0 .8cm× 1 .0cm ,最大病灶 3 .6cm× 5 .0cm ;病灶CT值 1 7～ 82HU ,平均 44HU。病灶无继发感染时 ,边界均清楚 ;囊内容物均未见增强 ,4例继发感染囊壁增厚伴有明显强化。病灶继发改变包括上颌骨受压、骨质硬化及凹陷。结论 :HRCT可准确显示鼻前庭囊肿位置、大小、数目、密度 ,也可清晰显示其并发症 ,有助于鼻前庭囊肿的诊断和鉴别诊断 。

Objective:T o study the HRCT features of nasal vestibular cyst and ev aluate its HRCT diagnostic value.Methods: 20 cases of nasal vestibular cyst pro ved by operation and pathology were retrospectively analysed. All the cases were performed by HRCT.Results:On HRCT scans,the c yst was located on the left side in 8 cases, on the right in 7 cases and on th e bilaterial sides in 5 cases.The shape of the lesions varied.Of these,14 cases appreared as similar-rounded in shape. All the lesions showed well-defined without accompanying infection .The minmum size was approxiate 0.8cm×1.0cm,the maxium size 3.6cm×5.0cm of the les ions.The CT value ranged from 17～82HU (mean:40HU).The content of cysts was non -enhanced.The walls of cysts were marked enhancement due to secondary infection in 4 cases. HRCT also demonstrated secondary findings such as bony sclerosis an d depression of the maxillary bone.Conclusion: HRCT may accurately demonstrate the site,size,number and density of the lesion as well as its complications of the nasal vestibular cyst.HRCT findings may aid the diagnosis and differential diagnosis of nasal vestibular cyst and may help to select the optimal operating approach.