Kushihashi T, Munechika H, Motoya H, Hamada K, Satoh I, Naitoh H, Nakajima H, Soejima K
Department of Radiology, Showa University, School of Medicine, Tokyo, Japan.
J Comput Assist Tomogr. 1995 May-Jun;19(3):379-82. doi: 10.1097/00004728-199505000-00008.
Tuberculous mediastinitis, a rare complication of pulmonary tuberculosis, may simulate a mediastinal tumor on chest radiography. For evaluation and follow-up of the disease, CT and MRI are needed.
Two cases of tuberculous mediastinitis are presented with emphasis on the importance of MRI. In both cases, MRI was performed because the CT appearance was unusual for a mediastinal tumor.
The areas of low signal intensity within the anterior mediastinal mass on both T1- and T2-weighted imaging were due to the reactive fibrous tissue and were suggestive of an inflammatory mass.
When a mediastinal mass would be unusual on CT, MRI should be performed. If there are areas of low signal intensity within the mass on both T1- and T2-weighted imaging, an inflammatory mass such as tuberculous mediastinitis, is one of the possibilities.
结核性纵隔炎是肺结核的一种罕见并发症，在胸部X线片上可能类似纵隔肿瘤。对于该疾病的评估和随访，需要进行CT和MRI检查。
介绍2例结核性纵隔炎病例，重点强调MRI的重要性。在这2例病例中，均因纵隔肿瘤的CT表现不典型而进行了MRI检查。
在T1加权成像和T2加权成像上，前纵隔肿块内的低信号区是由反应性纤维组织所致，提示为炎性肿块。
当纵隔肿块的CT表现不典型时，应进行MRI检查。如果在T1加权成像和T2加权成像上肿块内均有低信号区，则炎性肿块如结核性纵隔炎是可能的诊断之一。
