RÉSUMÉ
Objective:The aim of this study was to study the characteristics of neoplasm invasion type in ovary of two orthotopic models established with human epithelial ovarian cancer solid tumor tissue slices and human ovarian carcinoma cell line OVCAR-3 in nude mice and human epithelial ovarian cancer.Methods:Tumor tissues and cell line OVCAR-3 of human epithelial ovarian cancer were grown in subcutaneous tissue and the subcutaneous tumor source was fetched and inoculated in ovarian capsule of nude mice to establish the orthotopic implantation model. The neoplasm invasion type in the two kinds of models were observed. The neoplasm invasion types were also analyzed by pathological examination in 54 cases of International Federation of Gynecology and Obstetrics (FIGO) stageⅠ-Ⅱepithelial ovarian cancer.Results:Three neoplasm invasion types were found as follows: type of pseudocapsule, type of pseudocapsule invasion, type of pseudocapsule penetration. Pseudocapsule rate in the solid tumor slices group (18.2%) were lower than those in the cell line group (42.3%) ( P<0.05), while the pseudocapsule penetration rate in the solid tumor slices (50.0%) were higher than those in the cell line group (23.1%) ( P<0.05). No difference was found of pseudocapsule invasion rate between two groups ( P>0.05). Neoplasm invasion type in ovary changed with tumor planting time. High proportion of pseudocapsule type was found at the beginning of tumor planting, and the pseudocapsule penetration rate raised with tumor planting time increased. High proportion of pseudocapsule type was also found in patients with FIGO stageⅠepithelial ovarian cancer, and pseudocapsule penetration rate increased in those with FIGO stageⅡ. No difference in neoplasm invasion type was found between two kinds of pathological types ( P>0.05). Conclusions:There are differences between the two kinds of orthotopic models established with human epithelial ovarian cancer solid tumor tissue slices and human ovarian carcinoma cell line OVCAR-3. Compared to the solid tumor slices model, the cell line model is more stable for the follow-up study. The proportion of three neoplasm invasion types in ovary were more balanced in 8 weeks after tumor planting, and 8 weeks after tumor planting is the best start time for the follow-up experiment.
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Objective To observe CT features of primary yolk sac tumor (YST).Methods Clinical data and CT findings of 31 patients with primary YST proved by pathology were analyzed retrospectively.Plain CT was performed in 31 patients,while contrast enhanced CT scanning was performed in 23 patients.Results The lesions in 19 patients located in the gonads,including ovaries (n=11) and testes (n=8).Other lesions in 12 patients located out of gonads,including sacrococcygeal region (n =7),anterior mediastinum (n =3) and vagina (n=2).The tumors were oval shaped in 20 patients,while irregular shaped in other 11 patients.Well-defined boundary was found in 20 patients,whereas ill-defined boundary was found in 11 patients.Fat and calcification were found in 2 patients with teratomas.Moderate to marked enhancement of the solid part of tumors were observed in 23 patients,loofahs enhancement were observed in 17 patients,the blood vessels were found in 18 patients,while delayed enhancement of coated edge was found in 21 patients.The rupture of tumor capsule was found in 4 patients.Conclusion CT manifestations of YST have certain characteristics,which can provide imaging diagnostic evidences.
RÉSUMÉ
Objective To evaluate the value of digital tomosynthesis (TOMOS)in diagnosis of odontogenic cystic lesions of the jaws with oral fixed metal dentures, and compared with multi-slice spiral CT (MSCT). Methods The imaging findings of 40 cases with fixed metal dentures pathologically proved odontogenic cystic lesions of the jaws jn retrospective were retrospectively analyzed.All cases were performed by MSCT and TOMOS scanning,and 13 cases enhanced at the same time. The characteristics of the imaging findings in TOMOS and MSCT were compared. The diagnosis merits and disadvantages, especially their ability to detect the lesions and adjacent structures,were assessed. Results There were no significant difference (consistency check Kappa value>0.4) in evaluating the structure characteristics of the lesions, the relationgship between the lesions and cortex ,and the relationship between the lesions and surrounding organs. TOMOS is superior to MSCT in displaying apical change, the same in pure cystic and cystic-solid lesions interfered by artifacts.However, it is inferior to MSCT in detection of soft tissue invasion. Conclusion There is similar assessment value of TOMOS and MSCT in displaying odontogenic cystic lesions of the jaws. TOMOS can be chosen when the imaging findings of the lesions are interfered by metal artifacts.