Objective To study short-term therapeutic efficacy of mesh & plug repair for gerontal groin hernias. Methods 110 gerontal patients with groin hernia were treated by mesh & plug hernia repair with Mesh & Perfix plug. Results 98 cases(81.8%) were followed up for two years and no recurrence was found. Conclusions The Mesh & Perfix plug is a kind of ideal material for herniorrhaphy especially for gerontal patients or those with other diseases.

Understanding the basic mechanism of reading is the foundation for studying the pathogenesis of alexia and its rehabilitation care. Functional magnetic resonance imaging is one of imaging methods that can display the neurological activities in brain in vivo. It has been used in the studies of linguistics in recent years, particularly in the mechanisms of reading and processing. The article reviews the lateralization of Chinese single word processing and whether or not the specific brain region for cognitive processing of Chinese characters exists.

Objective To assess the value of 18F-FDG PET/CT in clinical classification,monitoring of chemotherapeutic response and surveillance of histopathological transformation of Castleman's disease (CD).Methods Fourteen pathologically diagnosed CD patients (7 males,7 females; mean age:(45.64±14.30) years) were retrospectively reviewed.18F-FDG PET/CT was performed before chemotherapy in all patients and 4 of 14 patients were reexamined after the treatment.The study parameters included histopathological results,sites,number and highest SUVmax of the lesions.Mann-Whitney and Kruskal-Wallis tests were used for data analysis.Results Of all the 12 patients without histopathological transformation,one or more enlarged and metabolically active lymph nodes were found in each patient (SUVmax =3.94± 1.44,range:1.9-6.8),including 2 unicentric CD (UCD) and 10 multicentric CD (MCD).There was no statistically significant difference of SUVmam between UCD and MCD (4.55±3.18 vs 3.82±1.14; Z=0.22,P＞0.05).There was also no significant difference of SUVmax among different pathological types (hyaline-vascular CD (4/12):3.56±0.96,plasma cell CD (6/12):4.73±1.41,mixed CD (2/12):2.30±0.57; x2 =4.74,P＞0.05).For the 4 patients with follow-up PET/CT after chemotherapy,the lesion activity was normalized in 3 patients and clearly reduced in 1 patient.The SUVmax of 2 patients with histopathological transformation (10.85±2.05) was significantly higher than that without transformation (3.94± 1.44; Z=-2.19,P＜0.05).Conclusion 18F-FDG PET/CT may play an important role in clinical classification,monitoring of chemotherapeutic response and surveillance of histopathological transformation of CD.

Objective To improve the knowledge of radiological manifestations , pathologic basis and differential diagnosis of hemangioma of long bones in children.Methods 7 cases with hemangioma of long bones proved by surgery and pathology were retrospectively analyzed .Results The X-ray features mainly included : (1) "soap bubbles" or cystic appearance;(2) "mesh" sign or "honeycomb" appearane,with or without cystic bone destruction;(3) Localized cortical thickening.Conclusion Radiographic findings of hemangioma of long bone is varied and relevant to pathological type, growth speed and pattern of tumor ; Though these will provide some help in diagnosis but it should be based on pathological evidence .

Objective: To evaluate the diagnostic value of fluorine-18 fluorodeoxyglucose ( 18 F-FDG) positron emission tomography/computed tomography ( PET/CT) in fever of unknown origin ( FUO) in a Chinese hospital .Methods:The records of 51 patients with FUO (32 men and 19 women;mean age 54 years with a range between 3 and 81 years) were analyzed retrospectively .All the patients were examined by 18 F-FDG PET/CT scan and the results were compared with the final diagnosis which was established by additional procedures including pathology , laboratory examination , and clinical follow-up for more than 3 months.The t test was used for statistical analysis .Results: A final diagnosis was established for 48 patients , including 32 patients with infectious diseases , 9 with malignancies , and 7 with non-infectious inflammatory diseases .By FDG PET scan alone , the rates of true positive , false positive , false negative, and true negative were 52.9%, 27.5%, 17.6%, and 2.0%, respectively.By FDG PET/CT scan, the rates of true positive, false positive, false negative, and true negative were 70.6%, 27.5%, 2.0%, and 0, respectively.18F-PET/CT had a sensitivity of 97.3%(36/37), specificity of 0 (0/14), and accuracy of 70.6%(36/51) in FUO, especially a high sensitivity and accuracy of 100%(9/9) in the diagnosis of malignant tumor .Moreover , the maximum standardized uptake value ( SUVmax ) in tumor was significant higher than that in infection (3.7 ±2.7 vs.7.7 ±3.5, P=0.001, t=3.6), which implied that SUVmax might be useful in differential diagnosis in FUO .Conclusion:FDG PET/CT is a valuable imaging tool for the identification and location of the potential lesion in FUO and is helpful for the etiological diagnosis , especially in the diagnosis of malignant lesions .

BACKGROUND:The establishment of a safe, reliable and easily repeatable mouse model of nonalcoholic fatty liver disease is the prerequisite for the study of the diagnosis and treatment of the disease.
OBJECTIVE:To establish a C57BL/6 mouse model of nonalcoholic fatty liver disease and observe changes of biochemical indicators, which can provide a theoretical basis for its pathogenesis and drug treatment.
METHODS:Sixty healthy male C57BL/6 mice were randomly divided into a control group of 30 cases (normal diet), and a model group of 30 cases (high fat diet). Models of nonalcoholic fatty liver were established. At 8 weeks, body mass, liver index, and homogenate superoxide dismutase activity in the liver were detected. Changes in serum alanine aminotransferase, aspartate aminotransferase, triglyceride glycerol, cholesterol, high-density lipoprotein cholesterol and low-density lipoprotein cholesterol were observed. Pathological examination was performed.
RESULTS AND CONCLUSION:(1) Pathological sections showed that large droplets and smal lipid droplets in the mouse liver and spread the whole liver. Swel ing of the liver cel s, visible cytoplasmic vacuoles and obviously inflammatory changes in liver cel s were observed in the model group. (2) Body weight and liver index were significantly higher in the model group than in the control group (P<0.05). Superoxide dismutase activity was significantly reduced in the liver (P<0.05). (3) Triglycerides, cholesterol, and low-density lipoprotein cholesterol levels were significantly higher, but high-density lipoprotein cholesterol levels were significantly lower in the model group than in the control group (P<0.05). (4) Nonalcoholic fatty liver mouse model is ideal for high-fat diet-induced animal model. The method is simple, repetitive, and can provide a stable animal model for the study on the mechanism of nonalcoholic fatty liver disease and drug treatment.

Objective To evaluate the usefulness of delayed parenchymal transit time (PTT) on 99TcmDTPA diuretic renography as a predictor for functional improvement after Anderson-Hynes dismembered pyeloplasty in patients with ureteropelvic junction obstruction (UPJO).Methods Forty-seven patients (37males,10 females,age (29.7± 10.8) years) with unilateral U PJO were retrospectively analyzed.All patients underwent 99Tcm-DTPA diuretic renography before and after the surgery.Patient age,sex,UPJO location,surgical methods,relative renal function (RRF) of the diseased kidney (uptake ratio of UPJO kidney to both kidneys),and PTT were recorded.Delayed PTT was defined as having one of the following criteria: (1) photopenic pelvis between the second and seventh frame; (2) relatively stable tracer distribution within the kidney between the second to ninth frame with nearly unchanged kidney shape and size; (3) ever increasing activity in the parenchyma; (4) slower clearance from the parenchyma into the pelvis since the second frame compared with the contralateral healthy kidney.The relationship between the above-mentioned factors and RRF improvement (RRFpvst-surgery,-RRFpre-sugery) was analyzed.Paired t test,Kruskal-Wallis and Mann-Whitney rank sum tests and Pearson correlation analysis were used.Results The average RRF of pre-and post-surgery was (40.70± 13.30) ％ and (44.96 ± 12.60) ％,respectively (t =4.19,P ＜ 0.01).RRF improvement between the delayed group (n=16) and normal timely PTT group (n=27) was significantly different: ((11.69±6.52) ％ vs (0.48±2.98) ％,Z=-5.13,P＜0.01).The assessment of delayed or normal PTT could not be determined in 4 patients.No statistically significant differences of RRF improvement were found between pre-surgery RRF ＜ 40％ and RRF ≥ 40％ groups,between left and right UPJO groups,between open surgery and laparoscope groups,between male and female patients (Z =-1.93 to 1.25,all P＞0.05).There was no significant correlation between RRF improvement and patient age (r =0.01,P＞0.05).Conclusion Delayed PTT on 99Tcm-DTPA diuretic renography might be the predictor for functional improvement post surgery in UPJO patients.

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Objective To evaluate and compare the normal value of glomerular filtration rate (GFR) in different modalities of single photon emission computed tomography (SPECT). Methods Fifty normal volunteers were divided into 4 groups (aged 20-29, n=14;30-39, n=10;40-49, n=14;50-, n=12). All of the volunteers underwent renal dynamic imaging with MPR SPECT, and single renal GFR value as well as total GFR value was calculated, respectively. The data were compared with GFR values obtained from Starcom 400AC/T SPECT (aged 20-29, n=6;30-39, n=11;40-49, n=7;50-, n=9). Single t test was used to testify the difference of the mean value between the two modalities of SPECT. Results The mean value of single renal GFR in each group of MPR SPECT was (51.03±11.12) ml, (48.44±11.13) ml, (47.79±7.71) ml and (46.54±12.28) ml,while of Starcom 400AC/T SPECT was (57.92±9.03) ml, (57.34±10.33) ml, (55.30±8.51) ml and (44.12±7.94) ml, respectively, and the total renal GFR in each group of MPR SPECT was (102.13±18.33) ml, (96.62±19.90) ml, (95.54±13.04) ml and (92.85±22.83) ml, of Starcom 400AC/T SPECT (115.86±16.51) ml, (113.14±17.71) ml, (110.54±11.13) ml and (88.12±14.41) ml, respectively (all P<0.05). The mean value of single renal GFR was (48.51±10.50) ml and (52.92±10.61) ml, respectively, while the mean value of total renal GFR was (97.04±18.16) ml and (105.63±18.72) ml, respectively (all P<0.05). Conclusion GFR standard value obtained from different SPECT renal dynamic imaging is varied. It is necessory to establish GFR standard value for each type of SPECT.