异位嗜铬细胞瘤的临床及MSCT诊断

目的探讨异位嗜铬细胞瘤的CT和临床特征。方法结合文献,回顾性分析有完整病史资料及手术病理结果的21例异位嗜铬细胞瘤的CT表现。结果良性者20例,边界清晰;恶性者1例,边界不清或清楚。肿瘤在CT上表现为圆形、椭圆形肿块;平扫有16例呈等密度实性肿块,5例瘤体平扫密度不均,呈等、低、混杂密度,其内有大小不等的中心性或不规则液化、坏死、囊变区。经增强后扫描肿瘤实性部分尤其是周边部分强化明显而持续,且门脉期多数仍呈持续强化,而坏死区无强化。结论结合临床资料,行搜索性CT平扫、增强扫描对异位嗜铬细胞瘤的定位及定性诊断起关键的作用。

Clinical and MSCT diagnosis of ectopic pheochromocytoma

Objective To investigate the computerized tomography （CT） and clinical data features of ectopic pheochromocytoma. Methods with renewing the literature,21 patients with ectopie pheochromocytomas examined by CT with complete clinical information and surgical pathologic results were analyzed retrospectively. Results 20 cases were benign presenting with definite edges, 1 ease was malignant presenting with indefinite, all tumors presented as round or oval shape, 16 tumors showed an equal density in plain scan CT images. 5 tumors showed an uneven density and an equal or lowly farraginous density with central necroses in plain scan CT images. Their tumor mass imaging was markedly enhanced especially on the mass rims where appeared extraordinary and lasting enhancement, and still remained enhancement on the portal venous phase scanning but the central necroses of the tumors had no enhancement. Conclusion The clinical information, plain scan for screening and enhanced scan were very useful for accurate diagnosis.