目的 探讨MRI多模态检查在直肠 肛管少见肿瘤的诊断价值。方法 将14例 经病理证实的直肠肛管少见肿瘤术前MRI 所见与术后病理进行对照分析。结果 14 例直肠肛管少见肿瘤患者的MRI表现基本 能对肿瘤的大小、形态、范围、内部结构 及与邻近器官的关系等进行比较清晰直观 的观察。结论 MRI多模态检查能多方位显 示直肠肛管肿瘤本身特点及其周围的解剖 结构，对直肠肛管少见肿瘤的良恶性及鉴 别诊断具有重要价值，对患者的临床诊断 及治疗具有十分重要的意义。

Objective To evaluate MRI multimodal examination in diagnosis of rare tumor of anorectum. Methods Comparative study on the preoperative MRI and postoperative pathology of 14 patients being diagnosed with rare tumor of anorectum by pathology. Results A clear observation on the size, the shape, the range, the internal structure of tumor, as well as its relationship with adjacent organs can be basically achieved through MRI performance of 14 patients with anorectum rare tumor. Conclusion Multimodal examination can multidimentionally demanstrate the characteristics of anorectum tumor itself and its surrounding anatomical structure, which is not only of great value in diagnosing the benign and malignant rare tumor of anorectum, but also significant for the clinical diagnosis and treatment of patients.