髓外造血组织增生的CT和MRI影像特征

目的:探讨髓外造血组织增生的CT和MRI影像特征,提高髓外造血组织增生的影像诊断水平,减少误诊。方法:采用CT及MRI对5例病理学确诊的EMH进行影像学分析。结果:3例EMH发生于中下胸段椎管,呈纵行波浪状软组织块影;1例病灶发生在纵隔两侧,邻近肋骨头膨大;1例EMH表现为胸壁内侧多发半圆形软组织块影。本组髓外造血灶MRI平扫为T1WI等信号、T2WI稍高信号,CT及MRI增强扫描均呈明显均匀强化。CT显示椎体呈栅栏样改变。MRI-T1WI可见脊椎信号弥漫性、均匀性减低。结论:EMH的CT和MRI的影像特征较明显,结合临床可作出影像学诊断。

CT and MRI diagnosis of extramedullary hematopoiesis

Objective: To investigate extramedullary hematopoiesis(EMH) of the CT and MRI features,improve the diagnosis level of extramedullary hematopoietic tissue hyperplasia,and reduce misdiagnosis.Methods:5 pathologic diagnosis of EMH were analysed by CT and MRI.Results:3 cases of EMH occurred in the lower thoracic spinal canal,showing the longitudinal wave-like soft tissue shadow;1 case was in the mediastinum on both sides,and the rib head enlargement;1 case EMH showed multiple semicircular soft tissue shadow inside the chest wall.The foci of EMH showed a significantly homogeneous enhancement on CT and MRI enhancement scans.CT scan showed a fence-like change in the vertebral body.Vertebral signal was diffuse and uniformity reduced on MRI-T1WI.Conclusion:EMH have special CT and MRI findings,it can be diagnosed by considering its CT and MRI findings and clinical manifestations.