Objective To investigate multifunctional direct digital radiography system (DDR) in clinical practice, in order to improve the applied value of it.Methods EPEX DDR was performed in 1000 cases,these images were analysedby 3 senior radiologists and tried to find the best method of usually positions. Results The quality of DDR was assessed as grade A in73.00%, grade B in 22.70%, grade C in 4.30%, and no waste film.Conclusion DDR is easy to operate, fast in capturing image and can provide post-processing techniques, which will facilitate the accurate diagnosis of radiography.

Objective To investigate the inhibition rate of cell proliferation, cell apoptosis rate and their effects on the cell cycle proceeding of the SSMC7721 cell line when 5-FU combined with thermotherapy is induced into the cells, and then provide theoretical bases to the combined therapy of hepatocellular carcinoma. Methods The inhibition rate of cell proliferation was detected by the MTT under different conditions, the cell cycle proceeding and the cell apoptosis rate was detected by flow cytometry and the subcellular structure was detected by the electronmicroscope. Results The cell inhibition rate of the thermotherapy group, 5-FU group and the combinedgroup were 18.4% ,28. 3% and 52. 7% ,respectively. The inhibition rates in the latter two groups were significantly different to the thermotherapy group. The results of flow cytometry showed that the cell numbers increased in G1 stage decreased in S stage,and increased in G2/M stage;the cell apoptosis rate increased. There was significant difference between different groups(P ＜ 0.01 or P ＜0.05). The results of the electronmicroscop showed that the nuclear chromatins agglutinated in the borderline and the mitochondriums became swelled. Conclusions The 5-FU combined with thermotherapy could significantly improve the inhibition rate of cell proliferation, inhibit the cell cycle proceeding from G1 stage to S stage, and induce cells apoptosis and change the subcellular structures in the SSMC7721 cell line.

Objective To explore the reason of misdiagnosis and discuss the reoperation in thyroid carcinoma.Methods The data of 77 patients that had reoperation because of misdiagnosis were analyzed.Results The daignosis of all 77 cases were only based on pre-operative physical and uhrasound examination.The post-reoperative follow up (3～41 monthes):no case was found local recurrence.Conclusions The preoperative frozen section may avoid misdaignosis and the effect of reoperation for misdaignosed cases are satisfactory.

Objective To explore the effect of intraoperative parathyroid hormone (IOPTH) examination on parathyroidectomy for primary hyperparathyroidism.Methods The clinical data of 41 PHPT patients who received IOPTH monitoring (IOPTH group) from Jan.2009 to Dec.2014 were retrospectively analyzed.The clinical manifestation,examination and changes of parathyroid hormone and calcium before and after operation were collected.Results There were 12 males and 29 females.36 cases had parathyroid adenoma,and 5 cases were parathyroid carcinoma.23 cases were positive in 24 cases of 99Icm-MIBI parathyroid adenoma radionuclide examination,and 2 cases were positive in 3 cases of parathyroid carcinoma radionuclide 99Tcm-MIBI inspection (P＝ 0.213).10 mins after tumor resection,PTH in all cases decreased by 50％ or more than that before tumor resection except for one case of parathyroid carcinoma.23 cases appeared hypocalcemia in 36 cases of parathyroid adenoma after surgery and 2 cases appeared hypocalcemia in 5 cases of parathyroid cancer patients (P＝0.361).No postoperative hoarseness,cough,bleeding occoured.Patients were followed up from 6 to 72 months.Hypocalcemia symptoms recovered 2 weeks to 3 months after surgery.No permanent hypoparathyroidism occured.One case of parathyroid carcinoma died of hypercalcemia 5 months after surgery.The remaining 40 cases survived without recurrence or death.Conclusions Intraoperative PTH monitoring can help doctors analyze whether all the hyperthyroidism glands have been removed,which can help to avoid miss diagnosis of multiple gland disease and unnecessary bilateral neck exploration.This method is highly accurate so it is recommended for routine use in PHPT surgery.

Objective:To investigate the treatment methods of peripheral T-cell lymphoma (PTCL).Methods:The clinical data of 251 newly treated PTCL patients in the First Hospital of Jilin University from August 2011 to October 2021 were retrospectively analyzed, from which 168 patients were intercepted from February 2015 (the first targeted drug of PTCL, chidamide, was launched in China) to October 2021, among which 20 patients received chemotherapy combined with brentuximab vedotin (BV, BV group), 37 patients received chemotherapy combined with chidamide (chidamide group), and 111 patients received non-targeted therapy (non-targeted therapy group); all patients received ≥2 courses of treatment. Ten patients received autologous peripheral blood hematopoietic stem cell transplantation, with non-transplanted patients in the same period as controls. The clinical efficacy and prognosis of patients with different treatment methods were analyzed. Kaplan-Meier method was used for survival analysis and log-rank test was performed.Results:Of all 251 patients with PTCL, 26.7% (67/251) received targeted therapy in combination with chemotherapy. In the chidamide group, the efficacy could be evaluated in 36 cases, with an overall response rate (ORR) of 91.7% (33/36); in the non-targeted therapy group, the efficacy could be evaluated in 88 cases, with an ORR of 71.6% (63/88); in the BV group, 20 cases were evaluable, with an ORR of 75.0% (15/20). The difference in ORR between the non-targeted therapy group and the chidamide group was statistically significant ( χ2 = 5.89, P = 0.015), and the difference in ORR between the non-targeted therapy group and the BV group was not statistically significant ( χ2 = 0.09, P = 0.759). The 1-year progression-free survival (PFS) rates were 79.9%, 88.2% and 64.2%, and the 1-year overall survival (OS) rates were 85.7%, 89.7% and 70.1% in the chidamide, BV and non-targeted therapy groups, respectively; the PFS and OS in the chidamide and BV groups were better than those in the non-targeted therapy group (all P < 0.05), and the adverse effects were mostly tolerable. Among patients treated with chemotherapy combined with BV, the ORR of patients with CD30 expression rate <60% and ≥60% were 54.5% (6/11) and 100.0% (9/9), and the difference was statistically significant ( P = 0.038). In the 10 hematopoietic stem cell transplanted patients and 50 non-transplanted patients, 1-year PFS rates were 87.5% and 59.5%, 1-year OS rates were 90.0% and 67.1%, and the differences were not statistically significant (both P > 0.05). Conclusions:Chemotherapy-based combination therapy is the main treatment methods for PTCL, and chemotherapy combined with chidamide or BV targeted therapy and hematopoietic stem cell transplantation can improve the long-term survival of PTCL patients.

BACKGROUND:Bone tissue defects are one of the most common diseases in orthopedics,and the current treatments for this disease are inadequate.The development of tissue engineering brings new hope for bone defect repair:by regulating the release of bioactive substances and the process of vascularization and neurogenesis at the defect site,it can effectively improve the microenvironment of bone tissue and promote osseointegration,which is the most promising research idea for large-size bone defect repair. OBJECTIVE:To explore the research progress of regulating bone microenvironment changes in bone defect repair in recent years from the effects of bioactive substances,vascularization and neurotization on three aspects of bone microenvironment changes,and to provide new ideas and strategies for the treatment of large-size bone defects. METHODS:The search terms"bone tissue engineering,angiogenesis,neurotization,cytokines,bone morphogenetic protein,vascular endothelial growth factor,neuropeptides,bone microenvironment"in Chinese and English were used to search for articles on the influence of changes in the bone microenvironment and their application in bone tissue engineering published from January 1,2001 to December 31,2022 on CNKI,WanFang,Web of Science,Science Direct,and PubMed.Finally,109 articles were included for review. RESULTS AND CONCLUSION:(1)The bone microenvironment is essential for the induction of bone tissue stem cell growth and differentiation,and mainly consists of the extracellular matrix of the bone tissue seeds and the biochemical factors required for intercellular interactions,the local blood circulation network and the surrounding nerve tissue.(2)Bone defect repair is a continuous process divided into multiple phases that overlap and are mediated by multiple cytokines,and the same cytokine can have mutually synergistic or antagonistic effects in one or more healing phases.(3)Neovascular regeneration is key to initiating bone repair,as neovascularisation not only provides essential nutrients,osteoblasts and growth factors for bone repair,but is also a gateway for repair cells to enter the injury zone.(4)In addition to regulating the type,dose and timeliness of vascular-inducing factor release to achieve blood transport reconstruction.The study of differential release delivery systems of multiple factors and the application of gene transfer technology will be the future research direction to solve large bone defects.(5)Neuropeptides can bind to relevant receptors and act on specific signaling pathways to guide vascular growth and influence bone healing,bone regeneration and the balance between osteogenesis and osteolysis through a variety of pathways.(6)In the establishment of neuralized tissue-engineered bone,the role of changes in the bone tissue microenvironment and neuromodulation is bidirectional.Cytokines in the bone matrix can participate in neuronal signaling pathways through the blood-nerve barrier.Neuropeptides secreted by glial cells act on the bone microenvironment,affecting bone healing,bone regeneration and the balance between osteogenesis and osteolysis.(7)There are still many questions regarding the regulation of the bone microenvironment by bioactive substances and the processes of vascularization and neurogenesis,such as the rapid diffusion and degradation of cytokines in the body and their loss of activity,the temporal and spatial distribution of angiogenesis-related growth factors,and the establishment of neurogenesis through the body's feedback regulatory mechanism,which need to be improved by subsequent studies.