Reversible Neurologic Dysfunction Research Articles

Exploring the Spectrum: An Original Observational Study of Posterior Reversible Encephalopathy Syndrome from Tertiary Center in Kerala

Introduction: Posterior reversible encephalopathy syndrome (PRES) is a disorder of subcortical vasogenic edema causing reversible neurologic dysfunction which includes headache, altered sensorium, seizures, and visual disturbances. It is a relatively rare disease with a myriad of nonspecific symptoms with similar presentations to that seen in other diseases such as stroke and cortical venous thrombosis. Hence, accurate diagnosis is needed for early detection to guide the management of such patients. This is a single-center retrospective study from June 2022 to May 2024 to identify the demographic profile, etiologies, imaging features, and prognosis of patients diagnosed with PRES. Materials and Methods: Diagnosis of PRES was made on the basis of clinical history, neurological examination, and magnetic resonance imaging brain after ruling out other possible differential diagnoses. The patients who satisfied Fugate et al. criteria were included in the study. The data were collected from the hospital database. Patients with alternate diagnoses were excluded from the study. Results: There were 22 patients diagnosed with PRES. There were 20 (91%) females among the cohort. Eighteen (82%) patients had headache. Fourteen (64%) patients had seizures all of which were generalized tonic–clonic seizures. All had positive imaging findings with 2 patients having leptomeningeal enhancement in the presence of normal cerebrospinal fluid findings. Blood pressure (BP) was normal in 5 (22%) patients. Most of the patients were postpartum without a prior history of hypertension or preeclampsia. Conclusion: PRES is a reversible entity with the imaging findings primarily involving the posterior part of the brain. It can also involve anterior circulation and spinal cord. Normotensive PRES is possible and should not be overlooked if the patient has all features of PRES but has normal BP. It has a female predilection with the most vulnerable state being immediate postpartum. Although recurrence is possible, PRES does not require long-term medications. Complicated PRES presents with SAH and intracranial hemorrhage.

A dynamic nomogram for predicting the probability of irreversible neurological dysfunction after cervical spinal cord injury: research based on clinical features and MRI data

BackgroundIrreversible neurological dysfunction (IND) is an adverse event after cervical spinal cord injury (CSCI). However, there is still a shortage of objective criteria for the early prediction of neurological function. We aimed to screen independent predictors of IND and use these findings to construct a nomogram that could predict the development of neurological function in CSCI patients.MethodsPatients with CSCI attending the Affiliated Hospital of Southwest Medical University between January 2014 and March 2021 were included in this study. We divided the patients into two groups: reversible neurological dysfunction (RND) and IND. The independent predictors of IND in CSCI patients were screened using the regularization technique to construct a nomogram, which was finally converted into an online calculator. Concordance index (C-index), calibration curves analysis and decision curve analysis (DCA) evaluated the model's discrimination, calibration, and clinical applicability. We tested the nomogram in an external validation cohort and performed internal validation using the bootstrap method.ResultsWe enrolled 193 individuals with CSCI in this study, including IND (n = 75) and RND (n = 118). Six features, including age, American spinal injury association Impairment Scale (AIS) grade, signal of spinal cord (SC), maximum canal compromise (MCC), intramedullary lesion length (IMLL), and specialized institution-based rehabilitation (SIBR), were included in the model. The C-index of 0.882 from the training set and its externally validated value of 0.827 demonstrated the model's prediction accuracy. Meanwhile, the model has satisfactory actual consistency and clinical applicability, verified in the calibration curve and DCA.ConclusionWe constructed a prediction model based on six clinical and MRI features that can be used to assess the probability of developing IND in patients with CSCI.

LncRNA KCNQ1OT1 predicts further cerebral events in patients with transient ischemic attack.

Transient ischemic attack (TIA) poses a great threat of cerebrovascular diseases to a large number of patients, despite its reversible neurological dysfunction. Long non-coding RNAs (lncRNAs) have been proven to play critical roles in the pathophysiological development of cerebrovascular events. Exploring the function of lncRNAs in modulating TIA prognosis would help to develop individualized therapeutics. A total of 231 participants with the first onset of TIA were recruited in the study, including 65 subsequent stroke patients. The expression of lncRNA potassium voltage-gated channel subfamily Q member 1 opposite strand 1 (KCNQ1OT1) was upregulated in patients with recurrent ischemic events after TIA. Additionally, KCNQ1OT1 could be regarded as an independent predictor for subsequent ischemic stroke. The optimal diagnostic value was determined at 1.29 with a sensitivity of 63% and a specificity of 72%. Fewer patients would survive from further ischemic stroke with their KCNQ1OT1 level over 1.29. Furthermore, the expression of KCNQ1OT1 was elevated with a growing serum high-sensitivity C-reactive protein (hs-CRP) level. KCNQ1OT1 might be involved in the regulation of early inflammatory response during recurrence of TIA.

Postoperative Dilatation of Superficial Temporal Artery Associated with Transient Neurologic Symptoms After Direct Bypass Surgery for Moyamoya Angiopathy.

In moyamoya angiopathy, transient neurologic symptoms (TNS) are occasionally observed after superficial temporal artery (STA)-middle cerebral artery direct bypass surgery. The purpose of this study was to investigate the correlation between TNS and postoperative magnetic resonance imaging as well as perform a perfusion study. We reviewed 52 hemispheres in 33 consecutive patients with moyamoya angiopathy. TNS were defined as reversible neurologic dysfunction without any apparent intracranial infarction or hemorrhage. All patients underwent magnetic resonance imaging and single-photon emission computed tomography before and within 5 days after surgery. Maximum diameter of STA on time-of-flight magnetic resonance angiography and the dilatation ratio of STA were calculated. The presence of signal changes on fluid-attenuated inversion recovery images and regional cerebral blood flow were also evaluated. TNS were observed in 13 of 52 (25%) cases1-16 days after surgery. The mean preoperative STA dilatation, postoperative STA dilatation, and dilatation ratio of STA were 1.33 mm ± 0.27, 1.67 mm ± 0.30, and 29.31% ± 28.13%. Postoperative intraparenchymal cortical hyperintensity lesions and high-intensity signals in the cortex sulci (ivy sign) were detected in 24 (46.2%) cases and 29 (55.8%) cases, respectively. Univariate analyses demonstrated no association between TNS and postoperative signal change on fluid-attenuated inversion recovery images as well as cerebral blood flow. Only>1.5-fold dilatation of STA was significantly correlated with TNS (P < 0.0001). STA dilatation was correlated with TNS after direct bypass surgery for moyamoya angiopathy.

Reversible neurologic dysfunction caused by severe vitamin deficiency after malabsorptive bariatric surgery

Significant deficiencies of both fat- and water-soluble vitamins have been reported to occur after malabsorptive bariatric surgery. However, despite the potential for neurologic manifestations of such deficiencies, few cases of central neurologic dysfunction have been reported. Our group previously reported reversible neurologic dysfunction as an unusual manifestation of vitamin deficiency in a postjejunoileostomy patient. We report on a second case of reversible neurologic dysfunction associated with severe, prolonged vitamin deficiency many years after jejunoileostomy. Neurologic function returned to normal with vitamin repletion. Patients who have undergone malabsorptive surgery are at risk of late metabolic complications and should be closely monitored.

Hypophosphataemia and Reversible Neurological Dysfunction in a Patient Subjected to Combined Renal and Pancreatic Transplantation

Hypophosphataemia and Reversible Neurological Dysfunction in a Patient Subjected to Combined Renal and Pancreatic Transplantation