CT and MR imaging of Spongiform leukoencephalopathy after heroin vapor inhalation： analysis of 13 cases

Objective: To study the CT and MR imagirig features of spongiform leukoencephalopathy after heroin vapor inhalation. Methods: The CT and MR imaging features and pathologic findings of 13 patients with heroin-induced spongiform leukoencephalopathy were analyzed. Results: CT scanning and MR] of all the patients showed diffuse,symmetric lesion in the cercbellar and cerebral white matter, and the cerebellum was invariably involved in all cases.Symmetric round Or butterfly-like lesions lateral to the midline of the cerebellum with clear border was the most distinct feature in CT and MRI examination. The lesions were not found in the anterior limbs of the internal capsules. CT scanning showed low-density changes while MRI TIWI imaging presented low-signal and T2WI high-signal lesions without space-occupying mass. The pathologic findings showed spongiform degeneration of the white matter in the central nervous system, but necrotic lesions were not observed. Condusions: Spongiform leukoencephalopathy should be considered when acute, cerebellar signs are present in patients who admitted a history of heroin inhalation. The CT and MRI manifestation of this disease is typical and the diagnosis can thus be made.     

Charcot-Marie-Tooth病1A型基因重复诊断研究

目的：探察国人Ｃｈａｒｃｏｔ－Ｍａｒｉｅ－Ｔｏｏｔｈ（ＣＭＴ１Ａ）型患者的１７ｐ１１．２－ｐ１２区基因重复及与临床表现型的关系。方法：对１５个ＣＭＴ１家系的２９名成员进行１７Ｐ１１．２－Ｐ１２区的３个短串联重复序列标记物进行多骤酶链反应－３种标记物的杂合率及多态性分析。结果：１６名ＣＭＴ患者检出ＣＭＴ１Ａ重复者９名（５５％）,１３名无症状家属中检出４名基因重复者,ＲＭ－ＧＴ、Ｄ１７Ｓ１３５７、Ｄ１