Objective To explore the diagnostic value of MRI in invasively pernicious placenta previa.Methods MRI and color doppler ultrasound were performed in 1 50 patients with pernicious placenta previa.According to the operation or pathology findings, the diagnostic value of placental invasion was compared among MRI,color doppler ultrasound and both of them.Analyzed and com-pared the MRI findings of 64 patients which were confirmed as invasive placenta including adherent placenta in 20 patients,implanted one in 38 and penetrated one in 6.Results Significant difference was not found among MRI,color doppler ultrasound and both in the diagnostic value of invasive placenta (P >0.05).There was a significant difference among adherent placenta,implanted one and pen-etrated one in the diagnostic value of MRI (P <0.05),and the highest and lowest values were penetrated placenta and adherent pla-centa respectively.Conclusion MRI is an important diagnostic method in invasively pernicious placenta previa,which was useful for its classification but with a limitation for the diagnosis of adherent placenta.

Objective To analyze the correlation between MRI features and pathological characterization of ovarian thecoma-fibro-ma.Methods MRI manifestations of 21 patients with ovarian thecoma-fibroma proved by pathological diagnosis were analyzed retro-spectively and compared with pathologic findings.Results The 21 cases involved 22 lesions (one patient had bilateral masses of the-cofibroma),including 13 fibrothecoma,4 thecofibroma and 5 fibroma.All lesions presented with well-defined margin,and cystic changes were found in 1 5 cases,7 lesions were solid masses ,1 9 lesions were round or oval masses ,2 lesions were lobulated mas-ses,and 1 lesion was irregular mass.The diameters of tumor ranged from 3.4 to 18.5 cm with mean diameter of 8.9 cm.On MR images,all lesions showed isointense or slight hypointense on T1 WI.On T2 WI,most tumors showed isointense or slight hypoin-tense,along with hyperintense cystic areas in 1 5 lesions,patchy slight hyperintense edema areas in 4 lesions,and homogeneous isointense or slight hypointense in 3 lesions.After contrast enhancement,all lesions demonstrated mild-to-moderate enhancement and delayed progressive enhancement slightly.13 cases associated with varied degrees of pelvic effusion,1 case with thickening of endometrium,and 1 case with endometrial carcinoma.Two patients had a higher level of CA125.Postoperative pathology demon-strated that all lesion were benign.Conclusion The MRI findings of the ovarian thecoma-fibroma are considerably characteristic and indirectly reflect pathology of tumor,thus beneficial to the correct diagnosis of tumor with relevant clinical information.

OBJECTIVE: To construct a kind of recombinant plasmid PGCsi-AQP1 delivery with DOPC and explore the inhibit effect of laryngeal carcinoma by RNAi targeting AQP1 in vivo. METHOD: Male BALB/c mice, 6 weeks of age transplanted with laryngeal carcinoma cell line Hep-2, four groups were divided randomly: Tail vein injection group (TVIG), Carcinoma around injection group (CAIG), negative control group (NCG) and blank control group (BCG). The recombinant plasmid PGCsi-AQP1 delivery with DOPC were inject into tail vein or surrounding tumor. HE pathological slides and tumor size were observed and inhibitory rate was figured up. The level of AQP1 protein expression and high microvessel density were detected by Immunohistochemical staining (IHC). RESULT: We constructed BALB/c mice models of laryngeal carcinoma successfully (1) HE staining: cell putrescence, nuclear pyknosis and apoptotic bodies were more in the tumor tissues of experimental groups than two control groups. (2) The total volumes of tumor in experimental group were both smaller than in two control groups (P < 0.01). The inhibition rate of TVIG and CAIG were 52.4% and 53.5% respectively and there was no significant difference (P > 0.05). (3) IHC: the AQP1 positive cells and microvessel density in TVIG and CAIG were both less than in two control groups (P < 0.01). CONCLUSION Neutral lipsomes DOPC could help carriaging the recombinant plasmid PGCsi-AQP1 to tumor and then play an inhibit role in laryngeal carcinoma tissue by RNAi targeting AQP1 in vivo.
Animals ; Aquaporin 1 ; therapeutic use ; Cell Line, Tumor ; Laryngeal Neoplasms ; therapy ; Liposomes ; Male ; Mice ; Mice, Inbred BALB C ; Neoplasm Transplantation ; Plasmids ; RNA Interference ; RNA, Small Interfering ; Random Allocation ; Transfection

Adult ; Amyloidosis ; Humans ; Laryngeal Diseases ; Male ; Recurrence ; Vocal Cords

Humans ; Rhinitis, Allergic ; diagnosis ; therapy

Humans ; Neck Injuries ; therapy ; Vertebral Artery ; injuries ; Vertebrobasilar Insufficiency

Humans ; Sarcoma ; diagnosis ; Skin Neoplasms ; diagnosis

Objective To evaluate the value of dynamic susceptibility contrast-enhanced MR imaging (DSC)in evaluation of brain tumor after operation.Methods 41 cases with brain tumors verified histologically,including 8 cases of high-grade gliomas,16 of low-grade gliomas,7 of metastases and 10 of meningiomas underwent DSC examination.All the cases at 3.0T MR unit.All primitive data were sent to ADW4.3 workstation for post-processing.The mean maximal rCBV and rCBF ratios of tumors,1 cm and 2 cm regions of peri-tumor were obtained respectively.The relativity of MR perfusion parameters(rCBV and rCBF)between diferent tumors were statistically evaluated by using Pearson correlative analysis.Results In the　solid region of tumors,rCBV and rCBF were statistically significant differences (P<0.05)between low-grade gliomas and the other three groups of tumors; in 1 cm region of peri-tumor between high-grade gliomas and the other three groups,and between low-grade gliomas and metastases,between the solid region and both regions of 1 cm and 2 cm peri-tumors at the same tumor were all of statistically significant differences(P<0.05),between 1 cm and 2 cm region of peri-tumors at high-grade gliomas and metastases,the rCBV and rCBF were also of statistically significant differences.Pearson correlative analysis showed that there were significant positive correlations between the mean maximal rCBV and rCBF　ratios at the same region in the same tumor's group.Conclusion DSC is very valuable in evaluation of the histopathological grade and the differentiation of brain tumor.

Objective To evaluate the safety of morphine hydrochloride injection. Methods Ear verin injection was used to evaluate the vascular irritation using the comparison of left side with right side in rabbits. Quadriceps femoris injection was used to evaluate the muscle irritation using the comparison of left side with right side in rabbits. Guinea pigs were intravenously injected with morphine hydrochloride injection at a dose of 2.8 mg·kg-1 once daily 3 times, stimulation was performed on 14 d after the last sensitization and the booster dose was 2 times the sensitization dose. The allergic reactions were observed. The different concentrations of morphine hydrochloride injection were placed in 2％ rabbit erythrocyte suspension, and then the hemolyzation and agglutination were observed. Results There were no significant vascular or muscular irritation and injury effects of morphine hydrochloride injection in rabbits. There were no evidenceof hemolyzation and agglutination in rabbit erythrocytes in vitro. No allergic reactions on guinea pigs in vivo were observed. Conclusion After treatment of morphine hydrochloride injection, neither obvious vascular /muscle stimulation or sensitization, nor hemolyzation or agglutination appeared in rabbits. The research results provide basic reference for the clinical rational and safe application of morphine hydrochloride injection.

Objective To investigate the establishment,operation and performance of external quality assessment(EQA) system for microbial morphology and detection of special drug-resistance in clinical laboratory,and explore the value of the developed system in clinical application.Methods The pictures of known bacteria and fungi colony,gram staining and acid-fast staining from clinical microbiology were distributed to the participating laboratories in Gansu province twice a year at regular intervals.The pictures of standard knowledge points from CLSI,such as special drug resistance were distributed simultaneously.All the participating laboratories were required to complete the interpretation for the pictures and report their resuhs in a scheduled time.Then the resuhs were summarized and analyzed as 3 modes:complete consistency,general consistency and non-consistency.Results During the 2 years when the EQA system for microbial morphology and detection of special drug-resistance were performed for 24 times,the rate of annual complete consistency increased year by year and reached to 91.3％ in 2015.Conclusion The EQA system based on the examinations of microbial morphology and CLSI standard knowledge points for clinical laboratory may supervise the staff of clinical microbiology laboratories in the hospitals at second grade or above to master the skills of morphological identification and learn CLSI knowledge points,so their professional skills of clinical microbiology could be comprehensively improved.