【摘要】 目的 提高对鼻咽癌复发的认识，回顾50例鼻咽癌复发的CT影像资料及临床资料，把鼻咽癌复发的CT诊断因素分为病灶区域的变化、病灶密度的变化以及颅神经受损的变化：分析其变化的原因，并把病灶的区域变化划分分原灶的复发、边缘性灶的复发和异灶的复发；了解区域复发的机率性；而病灶密度的变化主要是与放疗后纤维化肿块的相互区别。通过分析，对鼻咽癌复发的诊断，单因素一般较难，要综合上述因素分析，并结合临床，才能提高诊断率。更多还原

【Abstract】 Objective Analysis of 50 cases of recurrent nasopharyngeal carcinoma including CT images and clinical information． We compile the diagnostic significance of focus local changes、focus dense changes and changes due to damage of cranial nerves． We analyse the cause of changes divide the focus local changes into primary focus recurrence、marginal focus recurrence and far recurrence and compute the rate of local recurrence． The focus dense changes have to differentiated from the fibrious lump after radiation therapy． After analysis We discover that single factor diagnosis of recurrent nasopharyneal carcinoma is relatively difficult． It is with clinical information to raise the diagnose rate of recurrent nasopharyngeal carcinoma．更多还原