Surgical Treatment for Aseptic Mediastinitis in the Late Phase after Aortic Root and Arch Replacement / 日本心臓血管外科学会雑誌

Objective: A few cases of an aseptic abscess after thoracic aortic surgery have been reported. However, it sometimes requires surgical treatment because the rapid growth of perigraft fluid collection results in exposure towards the body surface. We discuss the results of our treatment of these cases. Methods: This study was a retrospective analysis. Four of 341 cases who underwent thoracic aortic surgery between April 2013 and March 2020 were included. These cases presented with a bulge of the body surface 10.3 (range, 3-27) months after surgery. Results: Although the fluids looked purulent in all cases, no bacteria were detected. We diagnosed them as aseptic abscess, for which omental implantation was performed. No signs of recurrence have been found in any cases even after 5.4 (range, 1-8.5) years. Conclusions: Omental implantation was effective for controlling aseptic abscess for long-term periods.

Characteristic of cardiac and neurological forms of non-polio enterovirus infection

Enterovirus infections (EVI) are ubiquitous and generally present with mild symptoms and have a favorableprognosis with full recovery. But sometimes it can be challenging to diagnose mixed forms of EVI which can result in fatal outcomes. An interesting case report on a patient admitted to the Grodno Regional infectious diseases clinical hospital. The patientwas diagnosed with enteroviral infection. Histological slides of the brain, heart, lung and other systemic organs were prepared on autopsy and are presented in this scientific paper. Generalized EVI in mixed form can cause primary lesions of the brain (destructive edema), the heart (necrotizing cardiomyopathy), and sepsis while also affecting other organ systems. This can lead to unfavorable outcomes similar to that in our case report. Mixed form EVI (meningitis, myocarditis, and sepsis) can progress rapidly towards an adverse course, with the development of severe life-threatening complications. We strongly suggest that mandatory PCR screening for EVI should be carried out in young individuals with sepsis-like diseases and with a fever of unexplained origin at the time of presentation.

Revision for Aseptic Loosening of Tumor Prosthesis in Lower Limbs / 肿瘤防治研究

Objective To determine the prosthesis survival and limb function after revision of global modular replacement system (GMRS) tumor prosthesis. Methods We retrospectively analyzed the clinical data of 16 patients who developed aseptic loosening of lower extremity tumor prosthesis and subsequently received revision with GMRS from 2009 to 2012. Kaplan-Meier method was used to calculate the 5- and 8-year survival rates of the prosthesis. The MSTS function scale was used to evaluate the functional outcomes. Results The average follow-up time was 90 months (52-118 months). The 5- and 8-year survival rates of GMRS prosthesis were both 94%. After revision, two patients failed, including one case of infection and one case of repeated aseptic loosening. The average interval between the first joint replacement and revision surgery was 81 months (27-187 months). Until the last follow-up, 93.3%(14/15) of the patients did not develop repeated aseptic loosening, 85.7%(12/14) of the patients who underwent GMRS revision had a longer loosening-free survival than those with the primary joint replacement (90.6±19.3 vs. 43.4±29.7 months, P=0.001). The average MSTS functional score was 27.7(24-30). Conclusion The incidence of repeated aseptic loosening for GMRS prosthesis is low and the limb function is good. The reported technique is satisfactory in the middle and long term.

Meningitis aséptica por varicela zóster sin rash vesicular previo en paciente VIH positivo. Presentación de caso / Varicella Zoster aseptic meningitis without previous vesicular rash in VIH positive patient. Case report

Resumen Un cuadro de meningitis aséptica, en el contexto de un paciente inmunosuprimido con diagnóstico de infección por Virus de Inmunodeficiencia Humana (VIH), debe llevar a pensar en múltiples diagnósticos diferenciales. Entre estos, se incluye el virus varicela zóster (VVZ) como uno de los principales agentes causales de meningitis a líquido cefalorraquídeo claro. Su reactivación da lugar a múltiples manifestaciones neurológicas potencialmente mortales en las que se consideraba al rash vesicular, o exantema pápulo/vesículo/ costroso como un signo fundamental para su diagnóstico. No obstante, las lesiones cutáneas están ausentes en más de un tercio de los pacientes con compromiso del sistema nervioso central. A continuación, se presenta el caso de un paciente con infección por VIH que presenta cefalea más fiebre, con hallazgos en líquido cefalorraquídeo de pleocitosis neutrofílica y una prueba molecular confirmatoria para virus varicela zóster, en ausencia de rash vesicular previo que guiara hacia este diagnóstico. MÉD.UIS.2021;34(1): 91-9.

Abstract The clinical presentation of aseptic meningitis in the context of an immunosuppressed patient with a diagnosis of Human Immunodeficiency Virus (HIV) infection, should lead us to consider multiple differential diagnoses. Among these, the Varicella Zoster Virus (VZV) has been found as one of the main causative agents of clear cerebrospinal fluid meningitis. Its reactivation gives rise to multiple life-threatening neurological manifestations in which vesicular rash, or papule / vesicular / crusted rash was considered a fundamental sign for its diagnosis. However, skin lesions are absent in more than a third of patients with central nervous system involvement. Herein, we report a case of an HIV-infected patient with headache, fever and neutrophilic pleocytosis with FilmArray that confirms Varicella Zoster virus infection in an immunocompromised patient in the absence of vesicular rash. MÉD.UIS.2021;34(1): 91-9.

Rheumatoid meningitis: report of two cases / Meningitis reumatoide. Informe de dos casos

ABSTRACT Rheumatoid meningitis (RM) is a rare complication of rheumatoid arthritis (RA). RM mimics many other conditions such as subdural empyema, unsteady gait, focal brain dysfunction, stroke, relapsing-remitting motor signs, headache, neuropsychiatric disorders, seizures, parkinsonism, and meningeal tumors. RM is considered a disease with poor prognosis. However, cases reported in the last decade show a good outcome. We report two cases with a favorable outcome. A 48-year-old man with a three-year history of RA admitted for headache, sensory disturbances, and speech difficulties. Brain magnetic resonance imaging (MRI) showed a left parietal subdural laminar lesion with restricted diffusion and a small left superior frontal acute infarction. A subdural empyema was originally suspected, and antimicrobials were prescribed. A follow-up MRI did not show progression of the subdural lesion and the patient was discharged 14 days after admission without focal deficits. A 44-year-old female patient with two years of seronegative RA was admitted for severe headache, confusion, nausea and vomiting. Brain MRI showed subtle supra and infratentorial leptomeningeal involvement and a left cerebellar acute infarct. A meningoencephalitis due to etanercept was initially thought and treated with dexamethasone. The patient was discharged but had to be admitted again and a new MRI showed a progression of the leptomeningeal involvement. She worsened and required endotracheal intubation. Cyclophosphamide was started and the patient became asymptomatic three months later. We propose that treatment should not be delayed waiting a biopsy when a diagnosis of RM is made and after a cerebrospinal fluid infection has been ruled out.

Meningitis reumatoide es una complicación rara de la artritis reumatoide. Esta enfermedad simula varias afecciones neurológicas, como empiema subdural, marcha inestable, accidente cerebrovascular, signos motores recurrentes-remitentes, cefalea, trastornos neuropsiquiátricos, convulsiones, parkinsonismo y tumores de las meninges. Es considerada de mal pronóstico, sin embargo, casos en la última década muestran lo contrario. Informamos dos casos con buen pronóstico. Un hombre de 48 años con tres años de artritis reumatoide ingresado por cefalea, trastornos sensoriales y dificultades del habla. La resonancia magnética (RM) cerebral mostró una lesión laminar subdural parietal izquierda y un pequeño infarto agudo frontal izquierdo. Inicialmente se sospechó un empiema subdural y se trató con antibióticos. Una RM de control no mostró progresión de la lesión subdural y el paciente fue dado de alta 14 días después del ingreso sin déficit focales. Una mujer de 44 años con dos años de artritis reumatoide seronegativa fue ingresada por cefalea, confusión náuseas y vómitos. La RM cerebral mostró un compromiso sutil leptomeníngeo supra e infratentorial y un infarto agudo cerebeloso izquierdo. Inicialmente se consideró una meningoencefalitis debido a etanercept y se trató con dexametasona. Fue dada de alta pero debió ingresar al hospital nuevamente y una nueva RM mostró progresión del compromiso leptomeníngeo. Ella se agravó y requirió intubación endotraqueal. Se inició ciclofosfamida y la paciente se hizo asintomática tres meses después. Proponemos que el tratamiento no debe retrasarse esperando una biopsia de meninges cuando se realiza un diagnóstico clínico de meningitis reumatoide, después de descartar infecciones meníngeas.

Severe dengue associated with aseptic meningitis, acute kidney injury, and sudden sensorineural hearing loss: A case report

Rationale: Dengue is the most important human arboviral disease. Neurological manifestations occur rarely in dengue. To the best of our knowledge, there is only one reported case of dengue-associated sudden sensorineural hearing loss (SSNHL) in Brazil untill now. Patient concerns: A 42-year-old man was presented to the emergency department with unconsciousness and generalized tonic-clonic seizures. Diagnosis: Dengue-associated aseptic meningitis, acute kidney injury, and SSNHL. Interventions: The patient was treated with anticonvulsants and thiamine and underwent mechanical ventilation. He received combined ceftriaxone and acyclovir, which were later switched to meropenem, acyclovir and ampicillin empirically until culture results became available. He also required hemodialysis and plasmapheresis sessions and fresh frozen plasma and buffy coat transfusions until definitive diagnosis. Outcomes: The patient was discharged after improvement of his general condition and of his blood test results, but hearing loss remained. A six-month follow-up visit showed persistent deafness. Lessons: Dengue should be included in the differential diagnosis of patients from dengue-endemic areas presenting an acute febrile disease with neurological manifestations. To the best of our knowledge, this is the second reported case of dengue-associated SSNHL, suggesting an association between dengue and development of SSNHL.

Research progress of deficiency of interleukin-36 receptor antagonist and cutaneous sterile pustulosis / 中华实用儿科临床杂志

Cutaneous sterile pustulosis is categorized as a non-infectious and non-follicular impetigo, with a low prevalence and difficulty in the treatment.Deficiency of interleukin(IL)-36 receptor antagonist (DITRA) is an auto inflammatory disease featured by the decreased interleukin-36 receptor antagonist (IL-36Ra) activity caused by IL36 RN mutation.Functional or structural defects of IL-36Ra increase the secretion of inflammatory and pro-inflammatory factors by keratinocytes, macrophages and dendritic cells.Upregulation of IL-36 receptor agonists induce type 17 helper T lymphocytes to secrete IL-17, which is essential for the onset of multiple subtypes of aseptic pustulosis.Research on the relationship between DITRA and cutaneous sterile pustulosis is important for developing targeted therapies.

Recent progress on the roles of DAMP and NET in organ ischemia-reperfusion injury / 器官移植

Ischemia-reperfusion injury (IRI) is a common pathophysiological phenomenon, secondary to multiple pathological processes, such as organ transplantation, acute kidney injury and myocardial infarction. IRI may significantly aggravate the severity of diseases and increase the fatality of patients. Aseptic inflammation is one of the critical mechanisms of IRI. Damage-associated molecular pattern (DAMP) is a pivotal substance, which mediates aseptic inflammation. After released into extracellular space, it could effectively activate the immune system, and initiate and maintain the inflammatory responses by binding with pattern recognition receptor (PRR). Neutrophil extracellular trap (NET) is a DNA-based network structure released by neutrophils during the process of inflammatory responses, which contains histones and multiple granular proteins. Recent studies have demonstrated that DAMP and NET may aggravate IRI via aseptic inflammation. In this article, relevant studies of DAMP, NET and their relationship in IRI were reviewed, which was of great significance for understanding the pathophysiological mechanism of IRI and studying the corresponding prevention and treatment strategies.

Meningitis aséptica por virus parotídeo asociada a la vacuna

Resumen Comunicamos el caso de un lactante mayor previamente sano, que luego de tres semanas de recibir la vacuna SPR (sarampión, parotiditis, rubeola) presentó fiebre, aumento de volumen parotídeo y compromiso de conciencia. Se diagnosticó una meningitis aséptica, con pleocitosis en el LCR de predominio mononuclear, detectándose virus parotídeo en LCR por biología molecular. En el Instituto de Salud Pública de Chile se realizó serología (IgM e IgG) que resultó positiva. La muestra de saliva confirmó la etiología por virus parotídeo con genotipo N. La evolución fue favorable, sin secuelas al seguimiento a seis meses. Ante esta situación clínica, se revisó la información respecto a la asociación y causalidad de esta entidad clínica y vacuna SPR, focalizado en diferentes cepas del virus parotiditis.

Abstract We report the case of an older infant with no prior morbidity that approximately 3 weeks after receiving MMR vaccination (measles, mumps, rubella) was hospitalized for feverish symptoms, increased parotid volume and compromised consciousness. Aseptic meningitis was diagnosed, detecting pleocytosis in the CSF, predominantly mononuclear, and confirming by molecular biology, presence of parotid virus in CSF. A study was carried out by the Institute of Public Health of Chile, where serology (IgM and IgG) was positive. Saliva sample confirmed the etiology of parotid virus with genotype N. The evolution was favorable and at 6-month follow-up, there were no sequelae. Given this clinical situation, information regarding the association and causality of this clinical entity and the MMR vaccine, focused on different strains of the mumps virus, was reviewed.

La brucelosis en el diagnóstico diferencial de las meningitis asépticas: a propósito de un caso

Aseptic meningitis represents a diagnostic challenge for the clinician. Cytological and chemical parameters are key in the differential diagnosis. Hypoglycorrhachia is a strong predictor of a bacterial origin for aseptic meningitis. We report a 44-year-old male with a history of recurrent febrile headaches admitted with fever and delirium. The initial cerebrospinal fluid (CSF) analysis showed low glucose levels. Magnetic resonance imaging did not show abnormalities. The patient was discharged but was admitted again three weeks later with fever, headache and a stiff neck. The CSF was inflammatory with low glucose levels. Serology for brucellosis was positive. The patient was treated with ceftriaxone and rifampicin with a good clinical response.

Endocarditis infecciosa de la válvula tricúspide asociada con meningitis aséptica: presentación infrecuente en una niña / Tricuspid valve infective endocarditis associated with aseptic meningitis: a rare presentation in a child

La endocarditis infecciosa es infrecuente pero potencialmente mortal. Las presentaciones atípicas retrasan el diagnóstico. El compromiso neurológico es habitual en la endocarditis de la válvula mitral, aunque infrecuente en la endocarditis de la válvula tricúspide. Si bien se han informado algunos casos e el del lado derecho con síntomas neurológicos en adultos, en la bibliografía no se ha descripto en niños. Se presenta una niña de 9 años con comunicación interventricular (CIV) congénita con fiebre, cefalea y rigidez de nuca. Sus síntomas clínicos y los hallazgos en el líquido cefalorraquídeo respaldaron el diagnóstico de meningitis aséptica. El día 3 del tratamiento con ceftriaxona, se resolvieron los síntomas; tras nueve días, reingresó con fiebre y rigidez de nuca. Un ecocardiograma mostró endocarditis de la válvula tricúspide. Recibió tratamiento antibiótico durante 6 semanas. Se realizó una cirugía cardíaca para la CIV y la insuficiencia de la válvula tricúspide.

Infective endocarditis (IE) is a rare but a potentially life-threatening infectious disease. Atypical presentations cause delays in the diagnosis. Neurological involvement such as meningitis or meningismus, are especially common in mitral valve endocarditis, but unusual in tricuspid valve endocarditis. Although few cases of right-sided IE have been reported with neurological symptoms in adults, children have not been described in literature. A nine-year-old girl with congenital ventricular septal defect (VSD) was admitted with fever, headache and neck stiffness. Her clinical symptoms and cerebrospinal fluid findings supported the aseptic meningitis. On ceftriaxone therapy day 3, her complaints were resolved; nine days later she was admitted with fever and neck stiffness again. Further investigation for fever source with echocardiogram revealed a tricuspid valve endocarditis. Antibiotic therapy was completed after 6 weeks. Cardiac surgery was performed for VSD and tricuspid valvular insufficiency.

Platelet count as a novel potential predictor of periprosthetic joint infection / 中国组织工程研究

BACKGROUND: Obtaining synovial fluid for diagnostic test of periprosthetic joint infection is invasive and painful to patients. Platelet count is a regular blood test which has been used as a possible predictor of several infectious diseases. Presumably, it could be one of the indicators of periprosthetic joint infection. OBJECTIVE: To identify the accuracies of platelet combined with white blood cell, erythrocyte sedimentation rate or C-reactive protein in the diagnosis of periprosthetic joint infection. METHODS: Patients undergoing revision arthroplasty from March 2013 to December 2018 in the First Affiliated Hospital of Guangzhou University of Chinese Medicine were retrospectively enrolled. A diagnosis of periprosthetic joint infection was confirmed in 77 patients according to the criterions from the Musculoskeletal Infection Society; the remaining 137 patients were confirmed as aseptic cases. White blood cell, erythrocyte sedimentation rate, or C-reactive protein and platelet count were compared between the two groups. The sensitivity, specificity, positive predictive value, and negative predictive value were calculated. RESULTS AND CONCLUSION: The platelet values were significantly increased in periprosthetic joint infection cases. Sensitivity and specificity of the platelet for periprosthetic joint infection were 64.94％ and 86.13％, respectively. Platelet demonstrated a higher accuracy when compared to erythrocyte sedimentation rate and C-reactive protein. In such cases, the platelet shows a certain reference value in confirming the diagnosis of periprosthetic joint infection. Platelet was enough used as adjunct diagnostic tool in patients suspected with periprosthetic joint infection.

Diagnosis and treatment experience of granulomatous cheilitis: case report and literature review / 口腔疾病防治

Objective@#To investigate the etiology, diagnosis and treatment of granulomatous cheilitis（GC）.@*Methods@# For a patient with recurrent granulomatous cheilitis for more than 1 year in whom no medical treatment was used, only systemic treatment of the teeth was performed, and its efficacy was observed. We also reviewed the relevant literature. @*Results@#The vermilion of the right lower lip of the patient was obviously swollen and soft. There was rebound and no pitting edema with palpation. A large dark red rash with local desquamation was observed on the skin over the right mandible. There were residual roots in tooth 35, 46, and 47, a porcelain bridge on 11-24, deep caries in 15, 16, 26, and 36, and many calculi in the whole mouth, and the gingival margin was obviously congested and swollen. Histopathological examination showed many lymphocytes infiltrated the superficial dermis, and granulation tissue, plasma cells and eosinophils infiltrated locally. The diagnosis was as follows: ① GC; ② 35, 46, and 47 residual roots; ③ 15, 16, 26, and 36 deep caries; ④ gingivitis. The treatment included extraction of 35, 46, and 47 residual roots, periodontal basic treatment, and fillings for 15, 16, 26, and 36. No drugs were administered except for 3 days after tooth extraction. After 5 weeks of treatment, the swelling of the lower lip and the skin rash completely disappeared. There was no recurrence in the follow-up observation at six months. Through a literature review and analysis, we found that GC may be related to various factors such as immunity, infection, and genetics. Local oral infections may be closely related to the incidence of GC.@*Conclusion @#Resolution of local oral infections is effective for the treatment of granulomatous cheilitis, and local oral infections may be closely related to the onset of granulomatous cheilitis. In the treatment of granulomatous cheilitis, attention should be paid to the systematic examination of the oral condition, and the treatment of suspected lesions in the oral cavity should begin in the early stages of treatment.

Efficient propagation with in vitro seed germination of Vanda falcata / 浙江大学学报（英文版）（B辑：生物医学和生物技术）

Vanda falcata (Thunb.) Beer (Orchidaceae), a famous native orchid of China, Japan, and Korea, is known as one of the most beautiful and charming orchid species in the world (Ohwi, 1965; Lawler, 1984; Arditti, 2008). V. falcata is widely cultivated and delights the world with its compact plant shape, elegant white blooms, and sweet coconut-like scent. However, vegetative propagation by division has limited the development of V. falcata because of its inefficiency (Mitsukuri et al., 2009a, 2009b).

Patient-reported Outcome Measures of Revision Total Hip Arthroplasty for Prosthetic Joint Infection is not Inferior to Aseptic Revision Total Hip Arthroplasty

@#Introduction: This study aims to investigate whether patients undergoing two-stage revision total hip arthroplasty (THA) for prosthetic joint infection (PJI) and one-stage revision THA for aseptic reasons have similar clinical outcomes and patient satisfaction during their post-operative follow-up. We hypothesise that the two-stage revision THA for PJI is associated with poorer outcomes as compared to aseptic revision THA. Materials and Methods: We reviewed prospectively collected data in our tertiary hospital arthroplasty registry and identified patients who underwent revision THA between 2001 and 2014, with a minimum of two years follow-up. The study group (two-stage revision THA for PJI) consists of 23 patients and the control group (one-stage revision THA for aseptic reasons) consists of 231 patients. Patient demographics, Western Ontario and McMaster Universities Arthritis Index (WOMAC), Oxford Hip Score (OHS), Short Form-36 (SF-36) scores and patient reported satisfaction were evaluated. Student’s t-test was used to compare continuous variables between the two groups. Statistical significance was defined as p <0.05. Results: The pre-operative demographics and clinical scores were relatively similar between the two groups of patients. At two years, patients who underwent revision THA for PJI reported a better WOMAC Pain Score and OHS as compared to aseptic revision THA. A similar proportion of patients were satisfied with their results of surgery in both groups (p=0.093). Conclusions: Although patients who underwent revision THA for PJI had poorer pre-operative functional scores (WOMAC function and SF-36 PF), at two years follow-up, these two groups of patients have comparable post-operative outcomes. Interestingly, patients who had revision THA for PJI reported a better clinical outcome in terms of OHS and WOMAC Pain score as compared to the aseptic group. We conclude that the revision THA for PJI is not inferior to aseptic revision THA in terms of patient satisfaction and clinical outcomes.

Establishment of artificial joint aseptic loosening mouse model by cobalt-chromium particles stimulation / 中国修复重建外科杂志

Objective: To explore the feasibility of establishment of a artificial joint aseptic loosening mouse model by cobalt-chromium particles stimulation. Methods: Twenty-four 8-week-old male severe combined immunodeficient (SCID) mice were divided into experimental group ( n=12) and control group ( n=12). The titanium nail was inserted into the tibial medullary cavity of mouse in the two groups to simulate artificial joint prosthesis replacement. And the cobalt-chromium particles were injected into the tibial medullary cavity of mouse in experimental group. The survival of the mouse was observed after operation; the position of the titanium nail and the bone mineral density of proximal femur were observed by X-ray film, CT, and Micro-CT bone scanning; and the degree of dissolution of the bone tissue around the tibia was detected by biomechanical test and histological staining. Results: Two mice in experimental group died, and the rest of the mice survived until the experiment was completed. Postoperative imaging examination showed that there was no obvious displacement of titanium nails in control group, and there were new callus around the titanium nails. In experimental group, there was obvious osteolysis around the titanium nails. The bone mineral density of the proximal tibia was 91.25%±0.67%, and the maximum shear force at the tibial nail-bone interface was (5.93±0.85) N in experimental group, which were significantly lower than those in control group [102.07%±1.87% and (16.76±3.09) N] ( t=5.462, P=0.041; t=3.760, P=0.046). Histological observation showed that a large number of inflammatory cells could be seen around the titanium nails in experimental group, while there was no inflammatory cells, and obvious bone tissue formation was observed in control group. Conclusion: The artificial joint aseptic loosening mouse model can be successfully established by cobalt-chromium particles stimulation.

Pathogenesis and clinical treatment progress of Kienbock’s disease / 中国组织工程研究

BACKGROUND: Kienbock’s disease is aseptic necrosis of the lunate bone due to various causes, and its pathogenesis is unknown. Because the soft tissue around the wrist articular surface is small, so it leads to poor blood supply, and the progressive necrosis is irreversible. Early specificity is poor, clinical diagnosis rate is low, and late teratogenicity and disability rate is high. The clinical diagnosis and treatment are complicated, and there are many procedures, but there is no accurate guidance. OBJECTIVE: To review the current research status of mechanism, stage and clinical diagnosis of Kienbock’s disease, to summarize the clinical treatment of Kienbock’s disease in recent years, so as to discuss the clinical efficacy of various programs and provide guidance for clinical diagnosis and treatment. METHODS: A computer-based online search of PubMed and CNKI databases from 1970 to 2019 was conducted. Key words were “Kienbock’s disease, lunate bone, necrosis, mechanism, treatment” in English and Chinese, respectively. About 900 articles were retrieved, and 52 articles eligible for the inclusion and exclusion criteria were included for review. RESULTS AND CONCLUSION: (1) The pathogenesis of Kienbock’s disease is unknown, its etiology is complex, and researchers believe that anatomy and biomechanics, and individual factors are main causes, which still need further research. (2) The Lichtman stage is widely used in Kienbock’s disease classification. The latest breakthrough in arthroscopy is expected to form a new classification standard, which can be diagnosed by X-ray, CT or MRI combined with “triple sign”. It has poor early specificity, so the rate of misdiagnosis is high, and it should be identified with wrist diseases. (3) Early-stage Kienbock’s disease usually receive conservative treatment, and advanced stage tends to undergo surgical programs, including free vascularized bone graft, the lumate resection + tendon tamponade, radial wedge and shortening osteotomy, scaphotrapeziotrapezoid fusion, proximal row carpectomy, and bone cement prosthesis replacement, and the follow-up outcomes are different, so there is still no perfect treatment program.

Effects of femoral prosthetic materials on artificial knee arthroplasty performance / 中国组织工程研究

BACKGROUND: Aseptic loosening of the femoral prosthesis is one of the important issues affecting the life of knee joint replacement. Particles from tibial polyethylene component wear and stress shielding are the main causes of this loosening, which are all related to the femoral prosthesis materials. OBJECTIVE: To study the effects of femoral prosthesis materials on the stress of the distal femur of the knee joint and the contact pressure on the polyethylene component by finite element method. METHODS: Knee arthroplasty models with four materials, titanium alloy, cobalt-chromium alloy, titanium-hydroxyapatite functional gradient biomaterial (FGBM I), titanium-bioactive glass functional gradient biomaterial (FGBM II), were established; the prosthesis was endowed with different material properties in the Abaqus finite element software. The stress distribution of the important vulnerable path in the femur and the changes of contact pressure on the polyethylene component under different materials were studied. RESULTS AND CONCLUSION: (1) Compared with the currently used titanium alloy and cobalt-chromium alloy, functional gradient biomaterials could significantly increase the stress at the femoral-prosthetic interface and the stress in the pathway of an important vulnerable region of the femur. In those materials, FGBM I increased most significantly. (2) Maximum stress of FGBM I and FGBM II prostheses on polyethylene insert was 20.41% and 19.98% lower than cobalt-chromium alloy, 20.07% and 19.63% lower than titanium alloy. (3) The results showed that functionally gradient biomaterials could produce higher stress at the distal end of the femur and lower contact pressure on the polyethylene insert, reducing the wear and stress shield on polyethylene insert, and FGBM I has significant effects.

Platelet count as a novel potential predictor of periprosthetic joint infection / 中国组织工程研究

BACKGROUND: Obtaining synovial fluid for diagnostic test of periprosthetic joint infection is invasive and painful to patients. Platelet count is a regular blood test which has been used as a possible predictor of several infectious diseases. Presumably, it could be one of the indicators of periprosthetic joint infection. OBJECTIVE: To identify the accuracies of platelet combined with white blood cell, erythrocyte sedimentation rate or C-reactive protein in the diagnosis of periprosthetic joint infection. METHODS: Patients undergoing revision arthroplasty from March 2013 to December 2018 in the First Affiliated Hospital of Guangzhou University of Chinese Medicine were retrospectively enrolled. A diagnosis of periprosthetic joint infection was confirmed in 77 patients according to the criterions from the Musculoskeletal Infection Society; the remaining 137 patients were confirmed as aseptic cases. White blood cell, erythrocyte sedimentation rate, or C-reactive protein and platelet count were compared between the two groups. The sensitivity, specificity, positive predictive value, and negative predictive value were calculated. RESULTS AND CONCLUSION: The platelet values were significantly increased in periprosthetic joint infection cases. Sensitivity and specificity of the platelet for periprosthetic joint infection were 64.94% and 86.13%, respectively. Platelet demonstrated a higher accuracy when compared to erythrocyte sedimentation rate and C-reactive protein. In such cases, the platelet shows a certain reference value in confirming the diagnosis of periprosthetic joint infection. Platelet was enough used as adjunct diagnostic tool in patients suspected with periprosthetic joint infection.

Enfermedad de neuro-Behçet con paquimeningitis en una niña / Neuro-Behçet disease presented with pachymeningitis in a child

La enfermedad de Behçet (EB) es un trastorno de vasculitis sistémica poco frecuente, de etiología desconocida, que se caracteriza por la presencia de aftas bucales, úlceras genitales y uveítis recurrentes. Afecta los sistemas nerviosos central y periférico; raramente se produce durante la niñez. La meningitis aséptica aguda aislada es muy poco frecuente. En este artículo, se describe el caso de una paciente de 14 años con diagnóstico de enfermedad de Behçet con afectación neurológica (neuro-Behçet). La paciente tenía cefalea aguda, diplopia, papiledema e irritación meníngea. Tenía antecedentes de úlceras bucales recurrentes. Las imágenes por resonancia magnética de cerebro revelaron paquimeningitis. Los hallazgos en el líquido cefalorraquídeo fueron pleocitosis y aumento de la presión. Pese al tratamiento médico, sus síntomas no se resolvieron. No se detectó uveítis y la prueba de patergia fue negativa. El alelo HLA-B51 fue positivo. Se consideró que los hallazgos apuntaban a la poco frecuente enfermedad de Behçet con afectación neurológica. La paciente mejoró drásticamente luego del tratamiento con corticoesteroides. En el diagnóstico diferencial de meningitis, se debe considerar la EB, a menos que se demuestre la presencia de un agente infeccioso. Hasta donde sabemos, anteriormente no se había descrito un caso de paquimeningitis con neuro-Behçet en la población pediátrica.

Behçet's disease (BD) is a rare systemic vasculitis disorder of unknown etiology characterized by recurrent oral and genital apthae and uveitis. It involves the central or peripheral nervous system; occurs rarely during childhood. Isolated acute aseptic meningitis is extremely uncommon. We report here a case of Neuro-Behçet disease (NBD) diagnosed in a 14-year-old girl. The patient presented acute headache, diplopia, papilla edema, and meningeal irritation. She had a history of recurrent oral ulcers. Brain magnetic resonance imaging revealed pachymeningitis. Pleocytosis and pressure increase were the cerebrospinal fluid findings. Although medical therapy, her complaints were not resolved. Uveitis was not detected, pathergy test was negative. HLA-B51 allele was positive. The findings were considered to unusual NBD. The patient improved dramatically after steroid therapy. BD should be considered in differential diagnosis of meningitis unless an infectious agent is demonstrated. To our knowledge, a case of pachymeningitis with NBD, was not described in children.