Objective:To investigate the clinical and imaging characteristics of central pontine myelinolysis (CPM) without hyponatremia and explore its pathogenesis.Methods:A retrospective analysis was performed. Six CPM patients without hyponatremia, admitted to Department of Neurology, He'nan Provincial People's Hospital from March 2021 to March 2023 were chosen. Demographic information, causes, medical history, clinical presentations, and MRI features at onset, and 1 and 3 months after onset were analyzed. The prognoses were evaluated by modified Rankin Scale (mRS) scores 3 months after onset: mRS scores≤2 was classified as good prognosis, and mRS scores>2 as poor prognosis.Results:In these 6 CPM patients without hyponatremia, 4 were males and 2 females; 4 patients had dizziness, 3 headache, 4 limb weakness, 2 cognitive decline, and 2 slow reaction. Four CPM patients had a history of hypertension, 5 had a history of diabetes, and 1 had a history of alcoholic cirrhosis. Hormone therapy, nutritional support and symptomatic treatment were given; 5 patients had obvious improvement, and 1 had poor prognosis 3 months after onset. MRI showed asymmetrical abnormal signal in the basal pons and bilateral brachium pontis, with T1WI hypointensity, T2WI hyperintensity, T2-FLAIR hyperintensity, DWI hyperintensity and clear boundary, and without obvious mass effect or enhancement. DWI sequence enjoyed good diagnostic sensitivity in early stage of CPM: high signal changes could occur within 24 h of clinical symptoms, and isointensity 3 months after onset.Conclusion:Causes of CPM without hyponatremia are mostly hypokalemia, diabetes, malnutrition, and chronic alcoholism; its characteristic MRI manifestations are "pig nose sign", "bat wing sign" and "trident sign".

Objective To analyze the clinical and imaging features of hemichorea associated with non-ketotic hyperglycemia(HC-NH)and to explore the perfusion of cerebral blood flow in the patients.Methods A retrospective study was conducted on 23 HC-NH patients diagnosed in Henan Provincial People's Hospital from January 2018 to December 2023.The clinical manifesta-tions,imaging features and prognosis were collected and analyzed,and the correlation with cere-bral blood flow hypoperfusion was investigated.Results The symptoms were all lateral involun-tary movements,of which 4 cases presented only single upper limb(1 case was left upper limb,the other 3 cases were right upper limb),and 19 cases had both upper and lower limbs involved(10 cases were left limb,and 9 cases were right limb).After the onset of the symptoms,the blood glucose level was 19.72±4.72 mmol/L,glycated hemoglobin level was(13.60±3.68)％,but all of patients were negative to urine ketone bodies.Hyperdense lesions in the contralateral basal ganglia region on CT images were observed in 6 cases.Strip or patchy hyperintensity was seen on T1-weighted MR images.All patients had ipsilateral stenosis of the vessels and regional hypoperfu-sion of cerebral blood flow as shown by MR perfusion-weighted imaging.All symptoms were re-lieved after actively controlling blood glucose,improving blood circulation,and symptomatic man-agement.Conclusion HC-NH is quite rare in clinical practice,and its occurrence may be related to cerebral blood flow hypoperfusion triggered by basal nucleus degeneration.

摘要 目的 探讨孤立性基底节区腔隙性脑梗死早期神经功能恶化（END）的相关影响因素。方法 连续性收集2020年1月—2023年12月就诊于郑州大学人民医院的孤立性基底节区腔隙性脑梗死患者236例，临床资料完整，根据是否出现END将患者分为END组59例及非END组177例，比较患者一般资料，使用多因素二元Logistic回归分析基底节区腔隙性脑梗死患者发生END的影响因素。结果 急性孤立性基底节区腔隙性脑梗死END发生率为25%（59/236），END组病灶累及内囊后肢患者比例、入院NIHSS评分、HbA1c水平、收缩压、女性均高于非END组，两组比较差异有统计学意义（P<0.05）。多因素二元Logistic回归模型分析显示病灶累及内囊后肢（OR=3.167，95%CI 1.305~7.690，P=0.011）是END发生的独立危险因素，HbA1c水平（OR=6.368，95%CI 1.555~26.075，P=0.010）、入院NIHSS评分（OR=2.019，95%CI 1.236~3.299，P=0.005）、收缩压（OR=1.626，95%CI 1.373~1.926，P<0.001）是END发生的相关危险因素。结论 孤立性基底节区腔隙性脑梗死END发生率较高，与病灶累及内囊后肢、入院NIHSS评分高、HbA1c水平升高、收缩压高相关。 Abstract Objective To identify influencing factors for early neurological deterioration （END） in isolated basal ganglia lacunar infarction （iBGLI）. Methods Clinical data were continuously collected from 236 patients with iBGLI confirmed by magnetic resonance imaging between January 2020 and December 2023. The patients were divided into END group （n=59） and non-ED group （n=177） according to the presence or absence of END. General patient information was compared between the two groups， and factors influencing the occurrence of END in patients with iBGLI were identified by multivariate binary logistic regression. Results The incidence of END in acute iBGLI was 25% （59/236）. The percentage of patients with lesions affecting the posterior limb of the internal capsule， admission NIHSS score， HbA1c level， systolic blood pressure， and number of females were significantly higher in the END group than in the non-END group （all P<0.05）. Multivariate binary logistic regression showed that lesions affecting the posterior limb of the internal capsule （odds ratio （OR=3.167，95%CI 1.305~7.690，P=0.011） was an independent risk factor for the development of END，whereas HbA1c level（OR=6.368，95%CI 1.555~26.075，P=0.010）， admission NIHSS score（OR=2.019，95%CI 1.236~3.299， P=0.005）， and systolic blood pressure（OR=1.626，95%CI 1.373~1.926，P<0.001） were associated risk factors for END. Conclusion The higher incidence of END in iBGLI is associated with lesions affecting the posterior limb of the internal capsule， admission NIHSS score， HbA1c level， and systolic blood pressure.
Prognosis