Objective and Methods As a local species, Chinese rare minnow (Gobiocypris rarus) has been one of the standardized test fish for chemical toxicity tests in China .By optimal screening , the acute toxicity of potassium bichromate and 3,4-dichloroaniline (3,4-DCA) was determined to evaluate repeatability and accuracy for Gobiocypris rarus in one laboratory and between different laboratories .Result Based on a proper data analysis , for the two chemicals per-formed with the same fish, all 96 h LC50 values were within mean ( x-) and upper and lower control limits ( ±2s) in both inner test ( in one laboratory ) and outer test ( between different laboratories ) .Conclusions From these results , a valid database could also be established to evaluate one single test .In addition, Gobiocypris rarus will not only be a potential test species for ecotoxicity tests , but also recommended as a standard laboratory animal .

Objective To investigate CT and MRI findings of giant cell tumors of the temporal bone(GCTTB).Methods CT and MRI features of 5 cases pathologically proven GCTTB were retrospectively reviewed.The lesion characteristics,including location, size,shape,margin,attenuation on CT scans,signal intensity on MR images,and enhancement pattern were documented and analyzed.Results In all 5 patients,the lesions were located adj acent to the mandibular fossa.These lesions were round or oval in shape,predominantly demonstrated as expansive lytic bone destruction containing hyperattenuating septa,calcifications,non-sclerotic borders,and discontinuous bony shells,with“boundary angle”sign.No soft tissue masses were found around the lesions.These lesions with different content demonstrated various MRI signal intensity,and the solid component enhanced intensely.Conclusion GCTTB is rare.Features such as expansive growing pattern,discontinuous bony shell,intralesional septa,calcification,and “boundary angle”sign are common,which may help in the radiographic diagnosis of giant cell tumor.

[Summary] The high-risk subjects of type 2 diabetes mellitus ( T2DM) in normal glucose tolerance ( NGT) were screened. The subjects with NGT at baseline were divided into high-risk and low-risk groups according to the diagnostic threshold of insulin area under the curve ( AUCINS ) 108. 43 mU/L. The incidence of prediabetes and/or T2DM was significantly increased in high risk group in comparison with low risk group ( 29. 41 vs 2. 21%, P<0. 01). The result suggests that the diagnosis threshold for AUCINS≥108. 43 mU/L can be used to screen the high-risk subjects of T2DM in NGT.

After the stratification of the normal glucose tolerance, the changes of insulin resistance and βcell function in the development of type 2 diabetes mellitus were investigated. A retrospective analysis on data of 275 cases with oral glucose insulin releasing tests. The area under the insulin curve (AUCINS ) 108. 43 mU/ L was taken as the critical value of diagnosis. Normal glucose tolerance subjects were divided into the NGT-a group(AUCINS<108. 43 mU/ L) and the NGT-b group(AUCINS≥108. 43 mU/ L). The plasma glucose, insulin, insulin sensitivity, and β cell function were compared among the 4 groups: NGT-a group (n=96), NGT-b group (n=49), prediabetes group (n=71), and type 2 diabetes mellitus group ( n = 59). Among the fasting insulin, 2 h insulin, AUCINS , early-phase insulin secretion index(△I30 / △G30), the ratio of total insulin area under curve, and total glucose area under curve, disposition index, homeostasis model assessment for insulin resistance, and Matsuda insulin sensitivity index, the relationship as follows: NGT-b group>prediabetes group>NGT-a group>type 2 diabetes mellitus group. The NGT-b group was always the highest, prediabetes group was lower, NGT-a group and type 2 diabetes mellitus group were the lowest, there were significant differences (all P<0. 05). Making the NGT-a group as the basic state, in the NGT-b group, β cell function has begun to appear compensation and insulin resistance, and β cell function compensation reached the peak, the β cell function in the prediabetes group was beginning to compensate for the deficiency, the function of β cell in type 2 diabetes mellitus group decreased further. These findings suggest that the development process of type 2 diabetes mellitus could be the following four stages according to the function of β cell: β cell function normal, β cell functional compensation, β cell function loss of compensation, and finally β cell function failure.

Objective To investigate the manifestations and features of CT for glandular cystitis as well as cystic cystitis.Methods Clinical manifestations and CT imaging features of 39 cases with biopsy-proved glandular cystitis or cystic cystitis were analyzed retrospectively.Results Among 39 cases,33 were glandular cystitis and 6 were cystic cystitis.Two out of the 33 cases with glandular cystitis had a negative CT scan,and 31 had a positive CT scan among which 4 cases with extensive lesions showed diffuse thickening of the bladder wall,and 27 were with localized lesions.Furthermore,19 out of the 27 cases showed localized thickening of the bladder wall with smooth edge,which was a continuation of surrounding normal bladder wall;8 showed nodular lesions.17 of the 33 cases with glandular cystitis underwent contrast-enhanced CT scan which showed mildly enhancement consistent with or slightly stronger than the normal bladder wall in 15 cases and moderate uneven enhancement in 2 cases.The 6 cases with cystic cystitis showed diffuse thickened rough bladder wall.There were cystic shadows of various sizes in the inner wall of the bladder partially protruding into the bladder,which presented as a"beaded shape"manifestation.Conclusion The characteristic manifestations of glandular cystitis as well as cystic cystitis on CT scan are of great significance in diagnosing both of the diseases.

Objective To analyze the clinical features and imaging findings of lesser trochanter osteoidosteoma,and to discuss the causes of its misdiagnosis as chronic osteomyelitis.Methods The clinical features,X-ray,CT and MRI findings of 6 cases with pathologically confirmed osteoidosteoma in the lesser trochanter were reviewed retrospectively.Symptoms included knee pain (1 case),thigh pain (4 cases)and hip joint pain(1 case);claudication(2 cases),and night pain(1 case).Five patients had right-side,and 1 patient had left-side involvement.All the 6 cases were misdiagnosed as chronic osteomyelitis before operation.Results Four patients had CT scan,which showed intra-cortical niduses at the lesser trochanters with peri-focal sclerosis,joint capsule swelling and joint effusion. Five patients had MRI exams,MR images showed bone marrow edema,synovial thickening,joint capsule swelling and joint effusion in all the 5 cases,but only 2 showed niduses.Six patients had X-ray imaging exams,X-ray images showed bone sclerosis without radiolucent nidus.Conclusion Osteoidosteoma in the lesser trochanter may display atypical clinical features that might be difficult to be differentiated from chronic osteomyelitis without sufficient examination.CT is best in showing niduses,except some niduses with atypical shape,superficial location and high-density calcification.MRI-T2WI is sensitive in showing the inflammation and bone marrow edema with high signal intensity,which may affect nidus displaying.X-ray images can only display bone sclerosis without niduses.