颅内原发淋巴瘤的MRI诊断及误诊分析

目的探讨颅内淋巴瘤MRI表现,分析误诊原因,以提高颅内原发淋巴瘤的MRI诊断水平。方法回顾性分析14例颅内原发淋巴瘤的MRI表现及误诊原因。结果颅内原发淋巴瘤T1WI多呈稍低信号,T2WI呈等或稍高信号,FLAIR呈稍高或高信号,DWI多为稍高或高信号。Gd-DTPA增强扫描病灶多呈明显强化。病灶形态可为多发结节状、团块状或不规则形,侵及胼胝体时可呈"蝴蝶征"。14例中MRI正确诊断5例,误诊9例,误诊主要原因是颅内淋巴瘤发生部位的不确定性及MRI表现的多样性。结论MRI能较好地分析颅内淋巴瘤的形态学改变及信号特点,可跟踪分析病情变化过程,但误诊率高,需进一步提高此疾病的诊断准确率。

MRI diagnosis and misdiagnosis analysis of intracranial primary lymphoma

Objective To improve the MRI diagnostic level of intracranial primary lymphoma, we discuss the MRI findings and analyze misdiagnosis reason. Methods 14 cases of intracranial primary lymphoma MRI findings were retrospectively analyzed. Results Primary intracranial lymphoma mostly showed slightly hypointense on T1WI, isointense or slightly hyperintense on T2WI, slightly hyperintense or hyperintense on FLAIR and DWI. The lesions were mostly significantly enhanced after Gd-DTPA enhancement scanning. The shape o...