鼻咽癌低分化鳞状细胞癌的MRI诊断

目的：旨在探讨鼻咽癌低分化鳞状细胞癌（PDSCC）的MRI表现与分型，了解PDSCC直接扩散，血行转移及淋巴转移关系，方法：40例PDSCC均经MRI检查和病理证实；根据癌肿生长的部位和形态分成Ⅳ类型进行分析。结果：40例PDSCC中37例向邻近组织直接扩展，5例血行转移，33例颈部淋巴结转移，统计学处理表明，32例腔内隆起型的肿瘤纵径越大，直接扩展侵犯邻近组织的数目越多，有显著性差异。结论：PDSCC是鼻咽癌高度恶性的癌肿，MRI分型各有特点，对该病的诊断，治疗和预防有重要价值。

MRI diagnosis of poorly differentiated squamous cell carcinoma of nasopharynx

Objective: To study MRI manifestaion and typing of poorly differentiated squamous cell carcinoma of nasopharynx(PDSCC), find out the reference among the direct diffusion of PDSCC, hematogenous metastasis and lymphogenous metastasis Method: On the basis of the region and shape of tumorigenesis, 40 cases of PDSCC proved by MRI examination and pathology were divided into four types for the study Results: 37 case diffused directly to neighboring tissues There were 5 case with hematogenous metastasis, 33 cases with cervica lymph node metastasis statistics showed that among the 32 cases of intracavitary prominent type of tumor, the larger the longitudinal meridians, the more direct diffusion invading neighboring tissues, the differences are significant Conclusions: PDSCC is hypermalignent tumor of nasopharynx MRI typing has their own characteristics, and invaluable valuation to diagnosis, treatment, prophylaxis of the disease