原发性腹膜后肿瘤的CT诊断

评价ＣＴ对原发性腹膜后肿瘤的诊断价值。对４３例手术，病理证实的原发性腹膜后肿瘤的ＣＴ表现进行回顾性分析，并与手术，病理所见相对照。结果；４３例腹膜后肿瘤的主要定位征像为：１．腹膜后壁层受压前移；２．腹膜后结构被推前移，被包绕或与肿瘤界面不清；３．其它：本组ＣＴ定位诊断正确率８３．７２％。良恶性肿瘤的大小无显著差异，囊性和均匀密度的肿瘤都为良性，不均匀密度在良恶性肿瘤中均可见；ＣＴ定性正确：良性肿瘤

CT Diagnosis of Primary Retroperitoneal Tumors

Purpose: To evaluate of CT in diagnosic values of primary retroperitoneal neoplasms (PRN). Materials and methods: CT findings of 43 cases PRN were analysed and cerrelated with surgery. Results: Among 43 cases, CT findings of localization include: (1 ) anterior displacement of posterior peritonaeum; (2) changes of abdomenal structures: a. anterior displacment, b. wraping up retroperitoneal organs and vessels, c. the border of mass being not clear; (3) others. The cerrect rate of CT localiztion is 83. 72% (36/43 cases). There is not any differentes in size between benign and malignant tumors (P>0. 05). The eystic and homogenous masses alomost are benign. The unhomogenous masses may be benign or malignant. CT localization of all PRNs is cerrect, but cerrect CT historical evaluation is only 16 cases of 43. Conclusion: CT is very valuable in localizical diagnosis of PRN, but value of CT is limited in evaluation of histology.