特发性甲状旁腺机能减退症颅脑CT及MRI表现

目的探讨颅脑CT及MRI检查对特发性甲状旁腺机能减退症(IHP)的诊断价值。方法回顾性分析16例经临床确诊的IHP患者头颅CT(16/16)和MRI(3/16)表现,观察病变的范围和密度/信号等特点。结果IHP颅内主要表现为多发钙化性病变,在CT上表现为高密度,CT值114～373HU,在MRT1WI呈稍高信号或高信号,T2WI呈等信号。双侧尾状核、苍白球、壳核及丘脑的对称性、条形或团块状钙化16例;双侧额、颞、顶、枕叶皮层下钙化10例;小脑齿状核钙化6例(双侧4例,单侧2例);侧脑室旁钙化2例。结论CT和MR对IHP的诊断非常重要,其中CT对病变的显示优于MR,与临床结果结合,对IHP具有定性诊断意义。

The Idiopathic Hypoparathyroidism on CT and MR Imaging Features of Brain

Objective To evaluate the value of the cerebral CT and MRI in the diagnosis of idiopathic hypoparathyroidism(IHP).Methods 16 cases clinically confirmed IHP were retrospectively analysed,with the emphasis on the location,density or signal intensity of the lesions.Results The intracerebral multiple calcification,which showed high density on CT,slightly high or high signal intensity on T1WI and isointensity on T2WI was the main finding on CT and MRI.Symmetric calcifications of caudate nucleus,globus pallidus,putamens and thalamas were found in 16 cases;calcifications of subcortex,dentate nuclei of cerebellum and periphery of the lateral cerebral ventricles were found in 10 cases,6 cases,and 2 cases respectively.Conclusion The intracerebral calcifications on CT and/or MRI are very important in the diagnosis of IHP,in which the sensitivity is higher on CT than that MR imaging.In combination of clinical results,IHP can further be correctly diagnosed.