Objective To investigate the diagnostic value ofbiomarkers in cerebrospinal fluid in differentiating meningeal carcinomatosis (MC) and tubercular meningitis (TBM).Methods The clinical features and cerebrospinal fluid (CSF) test results of 34 patients with MC and 44 patients with TBM,admitted to our hospital from January 1994 to August 2014,were retrospectively analyzed and compared.Results The main clinical manifestations of MC included headache and bowel and bladder dysfunction,and those of TBM were fever and headache.The cell population of MC and TBM patients increased and the number of leucocyte of TBM patients was significantly larger than that of MC patients (P＜0.05);the CSF of all the patients presented with decreased levels of glucose and chloride,and increased protein level,and higher protein in MC patients was noted than that in TBM patients (P＜0.05).The biomarkers in CSF of MC and TBM patients increased to varying degrees,and the biomarkers,including carcinoembryonic antigen (CEA),cancer antigen (CA) 125,CA 199,CA 153 and CYFRA21-1,in MC group were significantly higher than those in TBM group (P＜0.05).The neuron-specific enolase level in the TBM patients of Ⅲ grade was significantly higher than that in the MC patients (P＜ 0.05).Conclusion The detections of tumor biomarkers in cerebrospinal fluid is a tool in differentiating MC and all stages of TBM,especially with the combined detections of CEA,CA125,CA199 and CYFRA21-1.

Objective To investigate the effectiveness and safety of coaxial catheter technique in carotid artery stent implantation via radial artery approach.Methods The general and clinical data of patients,who underwent carotid artery stent implantation via radial artery approach at the Department of Neurology,Daxing Teaching Hospital of Capital Medical University of China between January 2021 and October 2022,were retrospectively analyzed.During the operation,coaxial catheter technology was used to make a 6F catheter inserting into the target vessel for performing carotid stent implantation,and the rate of successful catheter placement,surgical success rate,and perioperative complications were analyzed.Results A total of 40 patients,who underwent carotid artery stent implantation via radial artery approach,were enrolled in this study.The involved vessels included left internal carotid artery(n=16),right internal carotid artery(n=24),type Ⅰaortic arch(n=13),type Ⅱ aortic arch(n=20),type Ⅲ aortic arch(n=7),and bovine aortic arch(n=1).The rate of successful catheter placement was 100％,the surgical success rate was 95％,and no procedure-related complications occurred.The time spent on surgery was(34.4±13.6)min.No patients developed symptoms of cerebral infarction or myocardial infarction in 30 days after the operation.Conclusion The use of coaxial catheter technology can make the catheter inserting into the target vessel quickly and avoid repeated catheter exchange.Coaxial catheter technology is safe and effective in performing carotid artery stent implantation via radial artery approach.(J Intervent Radiol,2023,32:1169-1173)

Objective:To analyze the clinical and radiological features of patients with hypoplasia of the internal carotid artery.Methods:Four patients with hypoplasia of the internal carotid artery (including 3 patients with congenital absence of the internal carotid artery), admitted to our hospital from January 2010 to December 2021, were chosen in our study. The clinical data and imaging features of these patients were retrospectively analyzed.Results:The age of these patients ranged from 31 to 73 years, and two patients were female. Clinically,2 patients presented with dizziness, 1 patient presented with limb weakness, and 1 patient was asymptomatic. In 3 patients with congenital absence of the internal carotid artery, DSA results showed that the internal carotid artery was not developed, and CT bone window showed that the internal carotid artery canal was absent; 1 patient with hypoplasia of the internal carotid artery showed thin imaging in DSA results. One patient was combined with anterior communicating artery aneurysm and left internal carotid artery aneurysm. One patient was with vertebral arterial dolichoectasia. The collateral circulation compensation: type A was noted in 3 patients and type C was noted in 1 patient.Conclusion:The patients with hypoplasia of the internal carotid artery are usually asymptomatic, and patients with congenital absence of the internal carotid artery can have ischemic symptom; these patients can be complicated with vascular abnormalities such as aneurysm and vascular thickening.

Objective:To analyze the clinical and radiological features of patients with hypoplasia of the internal carotid artery.Methods:Four patients with hypoplasia of the internal carotid artery (including 3 patients with congenital absence of the internal carotid artery), admitted to our hospital from January 2010 to December 2021, were chosen in our study. The clinical data and imaging features of these patients were retrospectively analyzed.Results:The age of these patients ranged from 31 to 73 years, and two patients were female. Clinically,2 patients presented with dizziness, 1 patient presented with limb weakness, and 1 patient was asymptomatic. In 3 patients with congenital absence of the internal carotid artery, DSA results showed that the internal carotid artery was not developed, and CT bone window showed that the internal carotid artery canal was absent; 1 patient with hypoplasia of the internal carotid artery showed thin imaging in DSA results. One patient was combined with anterior communicating artery aneurysm and left internal carotid artery aneurysm. One patient was with vertebral arterial dolichoectasia. The collateral circulation compensation: type A was noted in 3 patients and type C was noted in 1 patient.Conclusion:The patients with hypoplasia of the internal carotid artery are usually asymptomatic, and patients with congenital absence of the internal carotid artery can have ischemic symptom; these patients can be complicated with vascular abnormalities such as aneurysm and vascular thickening.

Objective To rapidly establish a mouse model for optical imaging of the dynamical process of pseudotyped Middle East respiratory syndrome coronavirus (MERS-CoV) infection. Methods In vitro expression in HeLa cells and functions of hDPP4 encoded by recombinant adenovirus Ad5 and pseudo-typed MERS-CoV were verified. The recombinant adenovirus expressing hDPP4 (Ad5-hDPP4) was injected into BALB/ c mice, which were then injected with pseudotyped MERS-CoV expressing firefly luciferase at a titer of 3×107 TCID50(50％ tissue culture infective dose) via intrathoracic (I. T. ) or intraperitoneal (I. P. ) injection. MERS-CoV infection and tissue distribution were observed using optical imaging techniques. Re-sults hDPP4 and firefly luciferase were efficiently expressed in HeLa cells. In BALB/ c mice injected with Ad5-hDPP4 via I. P. , firefly luciferase expression were detected in abdomen between 48-96 h after pseudo-typed MERS-CoV infection. The expression of firely luciferase was also detected in chests of BALB/ c mice injected with Ad5-hDPP4 via I. T. around 48 h after pseudotyped MERS-CoV infection. Conclusions This study reported a simple and rapid method for establishing a mouse model for conveniently and dynamically monitoring pseudotyped MERS-CoV infection, which might provide an effective means for in vivo evaluation of neutralizing antibodies or entry inhibitors by visualization with optical imaging techniques.

Objective:To explore one-stage total knee arthroplasty (TKA) combined with open reduction and internal fixation (ORIF) for knee osteoarthritis complicated with tibial stress fracture.Methods:The 3 patients were retrospectively analyzed who had been treated for knee osteoarthritis complicated with tibial stress fracture at Department of Orthopedics, Ganzhou District People＇s Hospital from March 2018 to March 2020. They were all female, aged from 54 to 76 years (average, 66 years). There were 2 transverse fractures and one short oblique fracture; all of them had knee varus deformity. The Hospital for Special Surgery (HSS) scores averaged 37.6 (from 28 to 50) for the left knee and 28.3 (from 22 to 39) for the right knee. One-stage TKA was performed for the articular surface while ORIF for the right tibial stress fracture for all patients. Recorded were fracture union time, HSS knee score and range of articular motion.Results:The 3 patients were followed up for 25 to 44 months (average, 32 months).The fracture union time ranged from 4 to 7 months (average, 5 months). The last follow-ups revealed no such complications as prosthesis loosening, peri-prosthesis osteolysis or joint instability. Knee varus deformity was corrected in all patients. The HSS knee scores at the last follow-up averaged 89.6 (from 88 to 91) for the left knee and 88.3 (from 85 to 90) for the right knee.Conclusion:In the treatment of knee osteoarthritis complicated with tibial stress fracture, one-stage TKA combined with ORIF can restore the function of knee joint, leading to fine curative effects.