90 cases of intracranial tumors confirmed by CT diagnosis and perative pathological ex- amination were reported in this article.According to the typical CT findings in combination with clinical manifestations,a qualitative diagnosis of the tumors might be made.Atypical CT findings in some cases were analyzed and correlated with pathological data in order to raise the accurate rate in the qualitative disgnosis of tumors.Authors' experience in the misdiagnostic cases was summed up.

BACKGROUND:A newly developed calcium phosphate/β-tricalcium phosphate composite bone cement with a negative surface charge (genex?) has been reported to possess osteoinductivity properties. However, to our knowledge, no previous literatures have reported genex? for vertebroplasty in the osteoporotic spine.
OBJECTIVE:To evaluate the biomechanical properties and osteogenesis of vertebral bodies injected with genex? cement in a rabbit vertebroplasty defect model.
METHODS:Thirty New Zealand rabbits were used to establish osteoporosis models. Four weeks after modeling, model rabbits had an iatrogenical y created cavitary lesion at L 3 and L 5 and were injected with either genex? cement (experimental group) or polymethyl methacrylate bone cement (control group). The L 1 vertebral body served as model group without treatment. After 3 and 6 months, 15 rats from each group were executed respectively, and three vertebral samples were taken for Micro-CT analysis and biomechanical tests.
RESULTS AND CONCLUSION:(1) The Micro-CT showed better three-dimensional structure parameters of the trabecular bone in the experimental group than the control group (P<0.05) after 3 months, which however had no difference from the model group (P>0.05). After 6 months, the structure parameters in the experimental group were superior to those in the control and model groups (P<0.05). (2) After 3 months, the vertebral body compression strength of the experimental group was lower than that of the control group (P<0.05), but higher than that in the model group (P<0.05). The vertebral stiffness of the experimental group was lower than that in control and model groups (P<0.05). After 6 months, the vertebral body compression strength of the experimental group was not different from that of the control group (P>0.05), but stil higher than that of the model group (P<0.05). The vertebral stiffness showed no difference between three groups (P>0.05). These findings indicate that genex? cement can rapidly repair osteoporotic vertebral defects and improve the bone strength. Verterbroplasty with genex? cement has adequate osteoinductivity, biocompatibility, and adequate compressive strength.

Objective To investigate the apoptosis effect of ischemic postconditioning on levels of IL-6 and ATP during renal ischemia/reperfusion injury in obstructive jaundice rats. Methods One hundred SD rats were randomly divided into 5 groups: the Sham control group , I/R group , OJ-Sham group , OJ-I/R group , and OJ- I/R+IPO group, with 20 cases in each group. According to the time after ischemia/reperfusion, each group was divided into four subgroups (n = 5), with reperfusion time of 0 h, 1 h, 3 h, 6 h, respectively. After 1 week of biliary obstruction , rats were sacrificed at 0 h , 1 h , 3 h , 6 h post-I/R , and the left kidneys were taken, renal tissue was used for determination of the levels of interleukin-6 (IL-6) and adenosinetriphosphate (ATP). Results Compared with the OJ-I/R group, the serum level of BUN,Cr decreased significantly in the OJ-I/R-IPO group (P < 0.05). Conclusion Ischemic postconditioning can reduce the injury of kidney ischemia-reperfusion in OJ rais , which may be related to the reduced inflammation reaction and the energy metabolism in the kidney.

Objective To investigate the role of dynamic contrast-enhanced MRI (DCE-MRI) in the estimation of tumor angiogenesis and pathologic grading of extrahepatic cholangiocarcinoma.Methods Routine preoperative MRI and DCE-MRI scanning were performed on 57 patients with extrahepatic cholangiocarcinoma.The early signal enhancement ratio (eSER) and delayed signal enhancement ratio (dSER) of DCE-MRI were calculated.Microvessel density (MVD) and vascular endothelial growth factor (VEGF) expressions were detected in the extrahepatic cholangiocarcinoma tissue samples using immunohistochemical methods.The relations between the eSER or dSER and MVD,VEGF and the pathological grading of extrahepatic cholangiocarcinoma were analyzed.Results There was a positive correlation between the eSER or dSER and MVD of extrahepatic cholangiocarcinoma (r =0.62,P ＜ 0.05 ; r =0.45,P ＜ 0.05).The eSER of extrahepatic cholangiocarcinoma with a positive VEGF expression was higher than those with a negative VEGF expression (t =3.53,P ＜ 0.05).There was no significant difference in dSER between the positive VEGF expression group and the negative VEGF expression group (t =1.35,P ＞0.05).There was no significant difference in the eSER or dSER among the different differentiated extrahepatic cholangiocarcinoma (F =2.65,P ＞ 0.05 ; F =2.23,P ＞ 0.05).Conclusions The eSER and dSER reflected tumor angiogenesis of extrahepatic cholangiocarcinoma,and DCE-MRI contributed to the evaluation of biological features of extrahepatic cholangiocarcinoma in vivo.

ObjectiveTo explore the clinical significance of primary suture of common bile duct and early intermittented clamping of T-tube.MethodsOne hundred and one cases underwent bile duct surgery were divided into three group by random digits table,in which 33 cases were performed with primary suture of common bile duct (group A),33 cases were applied of early intermittented clamping of T-tube (group B),the other 35 cases were clamped T-tube as in routine measures (group C).The efficacy was compared between three groups.ResultsThe postoperative intestinal function recovery time,fluid support,hospitalization time in group A and group B was (47.63 ± 12.42) h,(2.75 ± 0.27) L/d,(8.0 ± 0.3) d and (57.63 ± 14.15) h,(2.97 ±0.49) L/d,(10.0 ± 0.4) d,which was significantly decreased compared with those in group C [ ( 98.27 ± 30.35 ) h,( 3.63 ± 0.38 ) L/d,( 19.0 ± 1.1 ) d ] (P ＜ 0.05 ).Postoperative intestinal function recovery in group A was significantly increased compared with those in group B (P ＜ 0.05 ).Alanine aminotransferase,aspartate aminotransferase,Gamma-glutamine transferase,body temperature,white blood cell count,total bilirubin,postoperative biliary fistula,common bile duct residual stones,stenosis of the common bile duct had no significant differences among three groups (P ＞ 0.05). ConclusionsPrimary suture of common bile duct and early intermittented clamping of T-tube can accelerate recovery of intestinal function,avoid electrolyte disturbance,reducing fluids,electrolytes and nutrition support,reducing the length of stay and costs,it has changed the traditional way of surgical treatment of bile duct,and is safe,efficient,also has significance of clinical application.

OBJECTIVETo evaluate the biomechanical properties of geneX cements for use in vertebroplasty in a calf osteoporotic vertebral compression fracture model.

METHODSThirty vertebral bodies (T(9)-L(4)) were harvested from 4 fresh calf spines. The bone mineral density was measured with dual-energy radiographic absorption. Osteoporotic vertebral model was induced in each vertebra using decalcifying chemical agents, and was then compressed to determine their initial strength and stiffness before injecting the cement. Thirty vertebral bodies were divided randomly into geneX(®) cement group, CSC group, and PMMA group. The fractures were repaired using a transpedicular injection of cements and re-compressed to measure posttreatment strength and stiffness.

RESULTSThe normal mean BMD of the calf vertebra was 1.425∓0.072 g/cm(2), which was reduced significantly to 1.074∓0.065 g/cm(2) after decalcification. The mean injected volume was similar between geneX(®) (4.5∓0.7 ml), CSC (4.3∓0.8 ml) and PMMA (3.8∓0.4 ml) groups. The vertebral strength was restored after the treatment to 1198∓529 N in geneX(®) group, 1212∓430 N in CSC group and 1672∓704 N in PMMA group. All the cements produced significantly greater strength than the initial strength (P<0.05). The augmented strength in geneX(®) and CSC groups were similar (P>0.05), but both were significantly less than that in PMMA group (P<0.05). The stiffness in geneX(®), CSC, and PMMA groups was 233∓130, 242∓191, and 323∓145 N/mm, respectively, showing no significant difference between them (P>0.05). No significant difference was found in the augmented stiffness among the 3 cements (P>0.05).

CONCLUSIONgeneX(®) cement is a useful alternative to PMMA in vertebroplasty for osteoporotic vertebral compression fractures, but further study is needed to evaluate its biosorption in vivo.

Animals ; Biomechanical Phenomena ; Bone Cements ; therapeutic use ; Cattle ; Disease Models, Animal ; Fractures, Compression ; etiology ; surgery ; Lumbar Vertebrae ; injuries ; Osteoporosis ; complications ; pathology ; Thoracic Vertebrae ; injuries ; Vertebroplasty