Tissue engineering trachea is an artificial trachea with biological activity, which is constructed in vitro by using tissue engineered principle and technology, and is a tracheal prosthesis for replacing large circumferential defect of the trachea. The course of its construction is as follows. First, seeding cells are cultured and expanded in vitro. Then they are collected, counted and seeded onto the biomaterial scaffold of tissue consistent and biodegradation. Finally, the biomaterial-cells construction is implanted into bio-reaction device or one’s subcutaneous layer. The tissue engineering trachea could be constructed after cultured certain times. Compared with other artificial trachea, the tissue engineering trachea has more advantages, such as nonimmunogenicity, no side-effects related to foreign graft materials, and biologic activity. This will bring some hope to look for an appropriate graft material. However, the study about it is still faced with some difficult problems, such as vascularized trachea, culturing in vitro, and prevention of infection in trachea prosthesia. So there will be long time for tissue engineering trachea to apply clinical tracheal transplantation successfully. This assay has reviewed the study about tissue engineering trachea from three sides——the source of seeding cells, the research about biomaterial scaffold, and the construction of tissue engineering trachea.
Abstract: Objective To investigate the clinical features of solitary fibrous tumor (SFT) in the thorax and its optimal surgical approaches. Methods We retrospectively reviewed the clinical records of 16 patients with SFT in the thorax in our hospital between January 2004 and June 2010. There were 8 males and 8 females, with a median age of 49 years (1973 years). Laboratory examination showed normal results. Chest Xray and computed tomographic scan revealed lung tumor in 8 cases, mediastinal mass in 3 cases, fibrous tumor in 2 cases, pleural mass in 2 cases, and retroperitoneal mass in 1 case. Five patients underwent CT guided biopsy or thoracoscopy, and 3 of them were diagnosed to have SFT. There was no clear diagnosis for the remaining 13 cases before operation. None of them had been exposed to asbestos. Symptoms were present in 5 patients. All patients underwent surgical treatment with resection performed through routine thoracotomy in 10 cases and by means of videoassisted thoracoscopy in 6 cases. The tumors originated from the visceral pleura in 12 patients, from parietal pleura in 3 patients (from diaphragmatic pleura in 1, and costal pleura in 2), and from the lung in 1 patient. Results All tumors were totally excised. Immunohistochemical staining showed CD34 was positive in all tumors. There was no postoperative mortality and no major complications. All patients were regularly rechecked and followed up. The followup was ranged from 1 to 72 months, with a median time of 21 months. During the followup, all patients survived and no recurrence was observed by means of chest X radiography or CT. Conclusion SFT tumors in the thorax are rare neoplasms and can have giant diameters. Wide local excision is recommended as the best therapeutic option. The SFT has the possibility of recurrence, and careful longterm clinical followup is required.
Objective To investigate the clinicopathological characteristics and surgical treatment of intrathoracic Castleman disease(CD). Methods Clinical data of 14 cases pathologically diagnosed as CD as analysed retrospectively. There were 6 males and 8 females, with an average age of 29 years(17-58). All were undergone surgical resection or biopsy. Among the 12 patients who had unicentric CD, 11 were performed open thoracotomy and lymphadenectomy with posterolateral or sternum approach, and one was treated by video assisted mini thoracotomy(VAMT). For the diagnosis of multicentric CD, one of the 2 patients had video assisted thoracic surgery(VATS) and wedge resection of the lung, and the other had video mediastinoscopy. Results No patient died perioperatively. All were successfully restored except two complications. One had dyspnea in the second postoperative day, as a result of the softening and collapse of bronchial wall in the entrance of the right main bronchus, which revealed by bedside fiberoptic bronchoscopy. One who had lymphadenopathy in the aortopulmonary window suffered from transient hoarseness after surgery. They recovered after symptomatic treatment finally. Regarding pathological classification, there were 11 cases of hyaline vascular type, 2 cases of plasma cell type and 1 case of mixed cellularity type. 13 cases were followed up for 8-110 months and longterm survive was achieved. No recurrence was observed in the 11 cases with unicentric CD and no relapse was occurred in the 2 cases with multicentric CD. Conclusion Both freezing pathology during operation and paraffin pathology postoperation are important for establishing the diagnosis. For unicentric CD, the clinical symptoms are significantly alleviated and it can be universally cured after operation. Multicentric CD needs multiple therapies after the diagnostic procedure and close follow-up.
Objective To investigate the clinicopathological characteristics and surgical treatment of intrathoracic Castleman disease(CD). Methods Clinical data of 14 cases athologically diagnosed as CD as analysed retrospectively. There were 6 males and 8 females, with an average age of 29 years(17-58). All were undergone surgical resection or biopsy. Among the 12 patients who had unicentric CD, 11 were performed open thoracotomy and lymphadenectomy with posterolateral or sternum approach, and one was treated by video assisted mini thoracotomy(VAMT). For the diagnosis of multicentric CD, one of the 2 patients had video assisted thoracic surgery(VATS) and wedge resection of the lung, and the other had video mediastinoscopy. Results No patient died perioperatively. All were successfully restored except two complications. One had dyspnea in the second postoperative day, as a result of the softening and collapse of bronchial wall in the entrance of the right main bronchus, which revealed by bedside fiberoptic bronchoscopy.One who had lymphadenopathy in the aortopulmonary window suffered from transient hoarseness after surgery. They recovered after symptomatic treatment finally. Regarding pathological classification, there were 11 cases of hyaline vascular type, 2 cases of plasma cell type and 1 case of mixed cellularity type. 13 cases were followed up for 8-110 months and longterm survive was achieved. No recurrence was observed in the 11 cases with unicentric CD and no relapse was occurred in the 2 cases with multicentric CD. Conclusion Both freezing pathology during operation and paraffin pathology postoperation are important for establishing the diagnosis. For unicentric CD, the clinical symptoms are significantly alleviated and it can be universally cured after operation. Multicentric CD needs multiple therapies after the diagnostic procedure and close follow-up.
Objective To observe expression of human antithrombin Ⅲ (hAT-Ⅲ) gene in vascular endotheliallike cells(VELCs) after transfected. Methods Human bone marrow mesenchymal stem cells(BMMSCs) were isolated, cultured and proliferated in vitro, and were differentiated into VELCs. Then, the VELCs were divided into experimental group cells and control group cells randomly. Plasmid DNA with hAT-Ⅲ gene was transfected into VELCs by liposome mediate. At last, the hAT-Ⅲ expression was determined by reverse transcriptpolymerase chain reaction(RT-PCR), immunohistochemical stain(IHCS), Westernblotting and chromogenic substrate assay at 72h and 96h respectively. In the control group, the plasmid DNA was replaced by TE buffer, and the other methods were the same as the experimental group. Results RT-PCR showed that the specific DNA fragment of hAT-Ⅲ could be amplifed in the experimental group cells, none in the control group. IHCS showed positive expression of hAT-Ⅲ in the experimental group cells, negative in the control group. Westernblotting showed that the specific band of hAT-Ⅲ could be detected in the experimental group cells culture fluid, none in the control group. Chromogenic substrate assay showed that the hAT-Ⅲ activity of the experimental group cells was 9.50%±1.52%, the control group was 1.83%±1.17%， there was statistically difference between two groups(t=7.910，Plt;0.01). Conclusion The hAT-Ⅲ gene could be transfected into VELCs and expressed successfully.
ObjectiveTo report the effect and experience of the extended resection and reconstruction of superior vena cava(SVC) and innominate vein for invasive mediastinal tumors.MethodsA retrospective study of 11 patients who underwent extended resection and grafts of SVC and innominate vein for invasive mediastinal tumor in Peking Union Medical College Hospital from 2001 to 2003 was performed. Radical resection was performed in 9 cases, among which SVC and left innominate vein were reconstructed with pericardium patch in 2, with prostheses(ringed GoreTex) interposed in 7.The other 2 patients who had incomplete resection also underwent prostheses interposition for SVC reconstruction. During operation, SVC and left innominate vein were clamped in turn,to avoid total interruption of blood return, clamping time for each site was 22.15±6.29 min. The volume of blood loss was 1 342.86± 692.48ml during operation.ResultsThe tumor included 4 invasive thymoma, 5 thymic cancer, 2 primary mediastinal small cell carcinoma. The patency was good in the grafts with external ring support and no SVC symptoms were observed in all cases postoperatively. One patient died of respiratory infection two weeks after operation, others are alive till now. The longest patent and functional graft is 30 months postoperatively.ConclusionSVC and innominate vein reconstruction by prostheses interposition can effectively eradicate the SVC syndrome. Clamping SVC needs careful study. Attention to the invasive extention of tumor should be made to avoid palliative operation,because complete resection is most important for long term survival.
目的 分析轮状病毒性腹泻患儿心肌受损情况和所伴随生化检验指标改变。 方法 2008年7月－2010年7月收治腹泻患儿80例，年龄6～27个月，平均12.9个月。其中有50例为轮状病毒腹泻（A组），30例为非轮状病毒性腹泻（B组）。A组患儿均符合轮状病毒腹泻诊断标准，有心肌损伤的异常指标但达不到心肌炎诊断标准者诊断为心肌损害。B组患儿有水样腹泻，但症状较轻，病程较短，轮状病毒抗原检测阴性。用全自动生化分析仪测定血清谷草转氨酶、乳酸脱氢酶、肌酸磷酸激酶和肌酸磷酸激酶同工酶，免疫亲和层析法测定血清肌钙蛋白值，并进行心电图检查。 结果 A组50例轮状病毒性腹泻患儿中，44例（88.0%）存在心肌损害，其血清谷草转氨酶（74.32 ± 13.77）U/L、肌酸磷酸激酶（52.01 ± 10.37）U/L、肌酸磷酸激酶同工酶（273.43 ± 27.55）U/L均升高，且明显高于B组[（24.98 ± 7.03）、（17.11 ± 6.52）、（151.46 ± 16.52）U/L]，差异有统计学意义(P＜0.05)。两组患儿的乳酸脱氢酶变化差异无统计学意义(P＞0.05)。 结论 轮状病毒性腹泻患儿往往伴有心肌损害及相应的血液生化检测指标改变；以肌酸磷酸激酶同工酶作为近期心肌损害的诊断指标更为特异和敏感。