Department of Neurosurgery, Louisiana State University Health Sciences Center, Shreveport, Louisiana 71103-33932, USA.
J Clin Neurosci. 2012 Jun;19(6):910-2. doi: 10.1016/j.jocn.2011.06.037. Epub 2012 Feb 17.
Open ring enhancement is considered highly specific for atypical demyelination. In this report we present a patient with a history of headache, ataxia and sensory disturbances in the lower extremities. A cranial MRI scan showed a large frontal lesion with mass effect, midline shift and with open ring enhancement. These findings are characteristics of tumefactive multiple sclerosis. Such lesions can be confused with neoplasms and abscesses. Open ring enhancement may help in differentiating atypical demyelination from a neoplasm or an abscess.
环形增强被认为是脱髓鞘疾病非典型性的高度特异性表现。本报告介绍了 1 例头痛、共济失调和下肢感觉障碍病史的患者。颅脑 MRI 显示额部大病灶，占位效应明显，中线移位，呈环形增强。这些表现特点符合肿块型多发性硬化。此类病灶可能与肿瘤和脓肿混淆。环形增强有助于将非典型脱髓鞘与肿瘤或脓肿相鉴别。
