涎腺嗜酸细胞腺瘤的影像学表现

Imaging findings of oncocytomas of salivary glands

目的探究分析涎腺嗜酸细胞腺瘤的影像学特点,提高诊断的准确性。方法回顾性分析8例经病理证实的涎腺嗜酸细胞腺瘤的影像学资料。其中男性6例,女性2例,年龄48~67岁,中位年龄64.5岁。结果8例嗜酸细胞腺瘤均为单发,6例位于腮腺,2例位于颌下腺;左侧5例,右侧3例。肿瘤最大者约3.5cm×3.0cm,最小者约1.2cm×1.2cm。8例嗜酸细胞腺瘤形态2例呈不规则形,通过茎突下颌间隙向咽旁间隙生长,另外6例呈圆形或类圆形。7例边界清楚、边缘光滑,1例局部边界欠清、边缘欠光整;3例为实性肿瘤,5例为囊实性肿瘤,均未见钙化、出血及坏死。增强后,2例实性肿瘤见明显均匀强化,1例实性肿瘤强化不均匀,内见裂隙样不强化;5例囊实性肿瘤强化不均匀,实性部分明显均匀强化,囊性部分无强化。结论涎腺嗜酸细胞腺瘤好发于中老年人,病灶多为单发、边界清楚,有通过茎突下颌间隙向咽旁间隙生长的特点,增强后明显均匀强化或伴有边缘小囊变、裂隙样不均匀强化,其CT及MRI影像检查的强化方式可为术前诊断提供重要依据。

Objective To analyze and summarize the imaging features of oncocytomas of salivary glands,and to improve the accuracy of diagnosis this disease.Methods The imaging data of 8 cases of oncocytomas of salivary glands confirmed by postoperative pathology were retrospectively analyzed.There were 6 males and 2 females;the youngest was 48 years old,the oldest was 67 years old,and the median was 64.5 years old.Results 8 cases of oncocytomas were single,6 cases located in the parotid gland,2 cases in submandibular gland;there were 5 cases on the left and 3 cases on the right.The largest tumor was about 3.5 cm×3.0 cm,and the smallest was about 1.2 cm×1.2 cm.Among the 8 patients with oncocytoma,2 presented irregular shape and grew from the styloid mandibular space to the parapharyngeal space,and the other 6 presented round or quasi-circular shape.In 7 cases,the boundary was clear and smooth;in 1 case,the local boundary was not clear and the edge was not smooth.There were 3 solid tumors and 5 cystic solid tumors,that calcification,hemorrhage and necrosis were not found.After enhancement,2 cases of solid tumors showed obvious uniform enhancement,1 case of solid tumors showed uneven enhancement and fissure-like unenhancement;5 cases of solid cystic tumor was not uniform enhancement,the solid part had obvious homogeneous enhancement while the cystic part had no enhancement.Conclusion Oncocytomas of salivary glands is predominant in middle-aged and elderly people,most lesions are single,the boundary is clear and smooth,characteristic of growth through the styloid mandibular space to the parapharyngeal space.After enhancement,it is obviously enhanced uniformly or accompanied by marginal cystic degeneration and fissure-like uneven enhancement.The enhancement of CT and MRI imaging can provide an important basis for preoperative diagnosis.