■我们描述了支气管囊肿(BCs)的计算机断层扫描(CT)和磁共振成像(MRI)特征,并分析了误诊。
■回顾性研究包括83例BCs患者。评估CT和MRI图像的肿块位置,最大直径,密度,钙化,信号强度,和增强模式。83例患者接受了普通CT检查,其中53例接受了增强CT检查。13例患者接受了平扫和增强MR,只有一个人得到了一个普通的MR。
■83个肿块都是孤立的,71个具有圆形形态,和12个具有分叶状或不规则形态。66个肿块是纵隔型,四是肺内型,13是异位型。14处病灶发生钙化。在普通CT上,13个病灶显示水样衰减(-20-20Hu),和70显示软组织衰减(≥21Hu)。在T1WI上,八个肿块是高强度的,三个是等强度的,三个是低信号。在T2WI和(表观扩散系数)ADC序列上,有14个质量是高强度的。在(扩散加权成像)DWI上,六个肿块是低信号,八个是高信号。增强T1WI显示7例未增强,而六个略有增强。20例误诊为胸腺瘤,十一是神经源性肿瘤,六个是淋巴管瘤,还有两个是肺癌.5例误诊为其他疾病。接受MR的BC患者(42.9%)的误诊率低于仅接受CT的患者(53.0%)。
■胸部BCs的影像学表现基本一致。当CT衰减值超过20Hu时,经常发生误诊。通过术前MR检查,BCs的诊断准确性趋于提高。
UNASSIGNED: We characterize computed tomography (CT) and magnetic resonance imaging (MRI) features of bronchogenic cysts (BCs) and analyze misdiagnosis.
UNASSIGNED: The retrospective
study consisted of 83 patients with BCs. CT and MRI images were assessed for mass location, maximum diameter, density, calcification, signal intensity, and enhancement pattern. Eighty-three patients underwent plain CT in which 53 underwent enhanced CT. Thirteen patients received both plain and enhanced MR, and only one received just a plain MR.
UNASSIGNED: Eighty-three masses were all solitary, with 71 having a roundish morphology, and twelve having a lobulated or irregular morphology. Sixty-six masses are mediastinal type, four are intrapulmonary type, and 13 are ectopic type. Calcification occurred in 14 lesions. On plain CT, 13 lesions displayed water-like attenuation (-20-20 Hu), and 70 showed soft-tissue attenuation (≥21 Hu). On T1WI, eight masses were hyperintense, three were isointense, and three were hypointense. Fourteen masses were hyperintense on T2WI and (Apparent Diffusion Coefficient) ADC sequence. On (Diffusion Weighted Imaging) DWI, six masses were hypointense and eight were hyperintense. Enhanced T1WI showed seven cases were unenhanced, while six were marginally enhanced. Twenty cases were misdiagnosed as thymomas, eleven as neurogenic tumors, six as lymphangiomas, and two as lung cancer. Five cases were misdiagnosed as other diseases. Patients with BCs underwent MR (42.9%) had a lower rate of misdiagnosis than those who underwent CT alone (53.0%).
UNASSIGNED: The imaging findings of BCs in the chest are generally consistent. Misdiagnosis occurs frequently when CT attenuation values exceed 20 Hu. Diagnostic accuracy of BCs tends to improve with preoperative MR examination.