Objective To explore the clinical manifestations of toxic epidermal necrolysis(TEN) and its rare pulmonary complications.Methods Clinical symptoms,treatment and prognosis of 1 child with TEN caused by carbamazepine were analyzed.Radiological images were reviewed to evaluate the manifestations and the outcome of chronic pulmonary complications associated with TEN.Results The patient had high fever shortly after a dosage increment of carbamazepine.A confluent erythematous exanthema developed rapidly into painful blistering with skin erosion,denudation and involvement of conjunctive and oropharyngeal mucosa.The diagnosis of TEN was made.The mucocutaneous damage was gradually recovered with steroid plus intravenous immunoglobulin for 3 weeks.However,the patient presented with respiratory failure in the recovery phase of TEN.The computer tomography revealed pulmonary bullae and pneumothorax in the right lung.Lung parenchyma was squeezed and pulmonary bullae ruptured with pneumothorax and atelectasis,which were absorbed gradually through thoracic drainages.The patient′s lung function and pulmonary bullae were partly improved during a 7-month follow-up.Conclusions TEN is a severe form of blistering skin di-sease which is characterized by an extensive loss of epidermis and mucous membrane.Chronic pulmonary complications may occur in recovery phase of TEN.Pulmonary bullae,which might be caused by mucous damage and respiratory obstruction,is a rare complication of TEN.

ObjectiveTo observe the clinical effect of unstable femoral intertrochanteric fracture treated with DHS. Methods Summarized 37 cases of unstable femoral intertrochanteric fracture treated by DHS,all cases were commented by fracture type,operation method and clinical effect. ResultsWe have followed up 37 cases from 0.8 to 4.7 years with average of 2.5 years.Conclusions DHS is one of the best implants due to its merits of strong fixation, little complication and early rehabilitation exercise.

Salmonella enterica serovar Cerro 87, which was isolated from a commercial egg-producing farm, has a phosphorothioated DNA backbone resulting DNA degradation(Dnd) during the pulsed field gel electrophoresis (PFGE) process. In this research, a gene deletion mutant XTG103 was engineered with the entire dnd gene cluster knocked out by double crossover using vector pKOV-kan, and lost Dnd phenotype corre- spondingly. We regulated the DNA phosphorothioation by heterogenous expression of dnd gene cluster with an isopropyl ?-D-1-thiogalactopyranoside (IPTG) inducible promoter PlacZ.

Objective To report 6 cases of hydroa vacciniforme-like cutaneous lymphoma,and to inves- tigate the relationship between this disorder and Epstein-Barr virus(EBV)infection.Methods Pathological and immunohistochemical examinations were performed in the biopsy specimens obtained from all 6 patients. Skin lesions were subjected to EBV encoded RNA(EBER)detection by in situ hybridization.Serological assay and quantification of EBV DNA were performed.Results All the 6 patients had recurrent papules, papulovesicles,necrosis and variola-like scar with chronic intermittent fever;four of the patients also presented with edema of the face,hands and feet.Pathologically,there were multilocular vesicles in the epidermis,and large numbers of infiltrating lymphocytes through the dermis.The cells were atypical with mitotic figures. Immunohistochemical staining of the lesions of 4 patients showed large quantities of cells expressing CD56, scattered cells expressing CD3 and CD45RO,and cells expressing grazyme B and T cell intracellular antigen-1 (TIA-1);a diagnosis of hydroa vacciniforme-like cutaneous NK/T lymphoma was made in these 4 cases. In the lesions of another 2 patients,the cells expressing CD3 and CD45RO,but not CD56,were observed; the diagnosis of hydroa vacciniforme-like cutaneous T-cell lymphoma was made in them.EBER was detected in the tumor cells of all the 6 patients.The IgG titers of anti-Epstein-Barr viral capsid antigen increased in all patients(1:5120 in 2 cases,1:2560 in 2 cases,1:1280 in 2 cases).The copies of EBV DNA were increased in the peripheral blood of both the two detected cases.A chronic active EBV infection was confirmed in all patients.Conclusions Hydroa vacciniforme-like cutaneous lymphoma is clinically characterized by edema of face,hands and feet,vesicular eruptions and variola like scars;histologically,it is characterized by infiltrates of atypical cells consistent with lymphoma,and necrosis in the center of vessels.NK/T is the primary immunophenotype of this disease.There is a close association between chronic active EBV infection and hydroa vacciniforme-like cutaneous lymphoma.

OBJECTIVETo explore surface roughness of bone cement and surround tissue on histological characteristic of induced membranes.

METHODSBone cements with smooth and rough surface were implanted in radius bone defect, intramuscular and subcutaneous sites of rabbits, and formed induced membranes. Membranes were obtained and stained (HE) 6 weeks later. Images of membrane tissue were obtained and analyzed with an automated image analysis system. Five histological parameters of membranes were measured with thickness,area,cell density,ECM density and microvessel density. Double factor variance analysis was used to evaluate the effect of the two factors on histological characteristics of induced membranes.

RESULTSMembranes can be induced by each kind of bone cement and at all the three tissue sites. In histological parameters of thickness,area and micro vessel,there were significant differences among the membranes induced at different tissue sites (P = 0.000, P = 0.000, P = 0.000); whereas, there were no significant differences in histological parameters of cell density and ECM density (P = 0.734, P = 0.638). In all five histological parameters of membranes, there were no significant differences between the membranes induced by bone cements with different surface roughness (P = 0.506, P = 0.185, P = 0.883, P = 0.093, P = 0.918).

CONCLUSIONSurround tissue rather than surface roughness of bone cements can affect the histological characteristics of induced membranes. The fibrocystic number, vascularity, mechanical tension and micro motion of the surround tissue may be closely correlated with the histological characteristics of induced membranes.

Animals ; Bone Cements ; Female ; Membranes ; cytology ; Rabbits ; Radius ; cytology ; Surface Properties ; Tissue Engineering ; methods ; Tissue Scaffolds

OBJECTIVETo evaluate the clinical application of intraoperative electrophysiological monitoring in lumbosacral selective posterior rhizotomy for spastic cerebral palsy.

METHODSTotal 372 dorsal roots of 89 patients underwent selective posterior rhizotomy at a single medical center. The dorsal roots from L3 to S1 were divided into rootlets and stimulated with a 1-second 50 Hz train. Motor responses were recorded by electromyography. Rootlets were assigned according to the extent of abnormal electrophysiological propagation, and grades of 3+ to 4+ were cut. If no electrical response was observed, the second criterion is the behavioral response (that is, muscle contraction in the legs or toes) assessed by the physical therapist, when rootlets were stimulated at the lowest threshold with a 1-second 50 Hz train.

RESULTSThe rootlets of 340 dorsal roots were assigned according to the extent of abnormal electrophysiological propagation, 324 (83.5%) roots were assigned the maximally abnormal response of grade 3+ (76, 22.4%) or 4+ (248, 72.9%) in EMG monitoring and were cut. For no electrical response was observed, according to the second criterion, 48 roots were partially cut. It was also be found that free running EMG occurred earlier than stimulus triggered EMG, and identified "abnormal" rootlets on free running EMG monitoring was more easily and quickly than on stimulus triggered EMG. During the postoperative 2 weeks in hospital, there was a significant decrease in lower-limb spasticity and an increase in range of movement in all patients, and no one case occurred obvious loss of muscle strength, abnormity of sensory, or deterioration of bladder/bowel control.

CONCLUSIONSThe spread of electromyography response to the contra lateral limb and/or upper extremity remains a valid criterion to define a "abnormal" posterior nerve rootlet that feeds into a disinhibited spinal circuit involved in uncontrolled spasticity. Intraoperative electrophysiological monitoring is reproducible and reliable for selection of "abnormal" rootlets.

Adolescent ; Cerebral Palsy ; surgery ; Child ; Child, Preschool ; Electromyography ; Female ; Humans ; Male ; Monitoring, Intraoperative ; Rhizotomy ; Spinal Nerve Roots ; surgery

OBJECTIVETo report the postmortem findings of a case of highly pathogenic H5N1 avian influenza virus occurring in human beings.

METHODSPostmortem examination was carried out in a deceased caused by highly pathogenic H5N1 avian influenza virus. Detailed light microscopy of major organs, including heart, lungs, liver, spleen, kidneys and brain, was performed. The lung tissue was further investigated by histochemistry, immunohistochemistry and electron microscopy.

RESULTSMajor histopathologic changes in lungs secondary to highly pathogenic H5N1 avian influenza virus included diffuse alveolar damage, hyaline membrane formation and focal hemorrhage. Some of the alveolar spaces contained lightly eosinophilic liquid, lymphocytes, macrophages, plasma cells and small number of neutrophils. Congested capillaries were commonly seen in the alveolar septa which were focally rimmed by hyaline membrane. Immunohistochemical study showed that the lymphocytes were mainly of T lineage and macrophages were also demonstrated.

CONCLUSIONSHighly pathogenic H5N1 avian influenza virus causes pathologic changes mostly in lungs, including diffuse alveolar damage and acute exudative changes (involving mainly T lymphocytes and macrophages). The resulting parenchymal destruction, consolidation, pulmonary edema and hemorrhage eventually lead to respiratory distress and death.

Adult ; Autopsy ; CD3 Complex ; analysis ; Fatal Outcome ; Female ; Humans ; Immunohistochemistry ; Influenza A Virus, H5N1 Subtype ; isolation & purification ; Influenza, Human ; metabolism ; pathology ; virology ; Leukocyte Common Antigens ; analysis ; Lung ; pathology ; ultrastructure ; virology ; Microscopy, Electron

We investigated the causative agents of hand, foot and mouth disease (HFMD) in children in Beijing epidemic from April to June of 2007. Totally, 82 specimens (including throat swabs, rectal swabs and vesicular swabs) were collected from 51 patients with HFMD. All patients had typical skin lesions, but no neurological manifestations. These clinical specimens were directly tested by RT-PCR assay with three primer sets: universal enterovirus, CA16-specific and EV71-specific primers. Enterovirus, CA16 and EV71 were identified depending on the size of PCR products. The percentage of the specimens identified as positive for enterovirus was 70.6%. Of the 51 cases, 25 were positive for CA16, 4 were positive for EV71, and 7 were enterovirus positive of non-CA16 or EV71. The ratio among them was about 6:1:2. EV71 strains belonged to genotype C4 after sequencing and phylogenetic analysis.
Child, Preschool ; China ; Enterovirus ; classification ; genetics ; isolation & purification ; physiology ; Female ; Genotype ; Hand, Foot and Mouth Disease ; virology ; Humans ; Male ; Phylogeny ; Reverse Transcriptase Polymerase Chain Reaction

OBJECTIVETo observe the effects of mesenteric lymph drainage on erythrocyte rheology and blood viscosity in hemorrhagic shock rats.

METHODSWistar rats were randomly divided into sham-shock group, shock group (establishing hemorrhagic shock model), drainage group (establishing hemorrhagic shock model plus drainaging shock mesenteric lymph from hypotension 1 h). At 3 h of hypotension or corresponding time, blood samples were harvested from the abdominal aorta for determining the erythrocytic parameters, erythrocyte electrophoresis, erythrocyte sedimentation rate (ESR) and blood viscosity, and the erythrocytes aggregation index and erythrocyte deformability index were calculated.

RESULTSCompared with the sham-shock group, the red cell contents, hematocrit (HCT), hemoglobin (Hb), mean corpuscular hemoglobin concentration (MCHC), erythrocyte electrophoretic rate and mobility, erythrocyte deformability index, whole blood viscosity, whole blood relative or reduced viscosity at low and high shear rates in shock group were observably lower, and mean corpuscular volume, electrophoretic time of erythrocyte, ESR, K value of equation and K value of emendation, erythrocytes aggregation index, plasma viscosity in shock group were increased markedly; the MCHC, erythrocyte electrophoretic rate and mobility, whole blood viscosity, whole blood relative viscosity at low and high shear rates in drainage group were reduced, and the red blood cell volume distribution width -SD (RDW-SD) was increased remarkably. At the same time, in drainage group, the HCT, RDW-SD, erythrocyte deformability index, whole blood viscosity and relative viscosity at low and high shear rates were higher, the ESR, K value of equation and K value of emendation, erythrocytes aggregation index, plasma viscosity were lower than that of shock group.

CONCLUSIONThe results indicate that the mesenteric lymph drainage could improve the erythrocyte rheological behavior, as a result, improve the hemorrheological properties in hemorrhagic shock rats.

Animals ; Blood Viscosity ; Drainage ; methods ; Erythrocyte Aggregation ; Erythrocyte Deformability ; Lymph ; Male ; Mesentery ; Rats ; Rats, Wistar ; Rheology ; Shock, Hemorrhagic ; blood ; therapy

Adult ; Aged ; Decompression, Surgical ; Female ; Humans ; Lumbar Vertebrae ; surgery ; Male ; Middle Aged ; Nerve Block ; methods ; Spinal Nerve Roots ; Spinal Stenosis ; surgery