恶性蝾螈瘤MR影像分析（附1例报道）

目的：探讨恶性蝾螈瘤（MTT）的MRI表现和临床病理特点,提高临床对MTT的认识.方法：手术切除辅以放疗治疗右前臂MTT 1例.结合文献复习,分析MTT的MRI表现及病理特征.结果：MTT的MRI表现为T1WI稍低信号、T2WI高信号的软组织肿块,肿瘤信号不均、T2WI上高信号肿块影内环形或线样低信号分隔影或许是MTT的特征性MRI表现之一.MTT的恶性度高,其治疗以手术切除为主,疗效及预后不佳,易在短期内复发及转移.结论：深入了解MTT的MRI表现,对MTT的早期诊断、早期治疗具有重要价值.

MR Imaging Analysis of Malignant Triton Tumor (Report of One Case)

Objective：To explore manifestations of magnetic resonance imaging（MRI） and pathologic characteristics of malignant triton tumor（MTT） , and to strengthen the understanding of MTT. Methods： One case of MTT on the right forearm with surgical resection supplemented by radiotherapy was evaluated. MRI appearance and pathologic features were analyzed retrospectively with reference to literature review. Results：MRI appearance of MTT was dominated by slightly low signal intensity on TI WI,high signal intensity on T2WI. Het- erogeneous signal intensity within the mass, circular and linear septa with low signal intensity on T2WI might be one of the MR characteristic manifestations of MTT. MTT was a high malignant tumor. Treatment of MTT was dominated by surgical resection, poor therapeutic effects and prognosis was prone to its recurrence and metastasis in a short period. Conclusions ： Further understanding about MRI characteristics of MTT is very valuable for early diagnosis and treatment.