Biomedical subjects

Xiao-dong Tang

Publications and source records attributed to Xiao-dong Tang.

9 recordsLinked to original sources

PubMed2006

[Preliminary report of combination chemotherapy including Arsenic trioxide for stage III osteosarcoma and Ewing sarcoma].

OBJECTIVE: To determine the efficacy of Arsenic trioxide combined with other chemo agents in patients with metastatic osteosarcoma and Ewing sarcoma. METHODS: From December 2002 to June 2005, 32 patients with metastatic osteosarcoma and Ewing sarcoma were treated with chemotherapy comprised Arsenic trioxide, including 19 male and 13 female, aging from 7 to 32 years. Diagnoses included 27 cases with osteosarcomas and 5 with Ewing sarcomas. Twenty-five and 7 patients had multiple lung and skeletal metastasis respectively. All patients had received 4 to 6 cycles standard chemotherapy and surgical treatments before the metastatic lesions were found. The chemotherapy protocol consisted of Arsenic trioxide, VP-16 and paclitaxel. Twenty-eight patients accepted 2 cycles, and 4 patients accepted 3 cycles chemotherapy. RESULTS: Five patients (15.6%), whose lung focus disappeared and no new metastases proved, got complete response (CR); Six patients (18.8%) got partial response (PR); In thirteen stable disease (SD) patients (40.6%), the metastatic lesions did not reduce in evidence but completely calcified in 2 patients and partly calcified in 11 patients; Eight patients (25%) whose tumor size was even bigger after the chemotherapy were defined as progress disease (PD). The average follow-up period was 20 months (ranging from 6 months to 3 years). Three patients were eventually died; The disease was progressed in 5 patients, and the tumor growth was controlled in 24 patients. CONCLUSIONS: Arsenic trioxide is a low-toxic and effective remedy for treatment of stage III osteosarcoma and Ewing sarcoma.

Adolescent↗

PubMed2005

[Surgical treatment of metastatic spinal tumors by anterial approach].

OBJECTIVE: To investigate the efficacy of surgical treatment of the patients with metastatic spinal tumors by anterial decompression and stabilization. METHODS: From December 1997 to December 2003, 93 patients (40 women and 53 men) with metastatic spinal tumors were treated in our department. The locations of the tumor included, thoracic vertebra (53 cases), lumbar vertebra (33 cases), and cervical region (7 cases). The original tumors included lung cancer (21 cases), renal cancer (13 cases), prostate cancer (8 cases), hepatic cancer (5 cases), breast cancer (13 cases), thyroid cancer (5 cases), gastrointestinal tumor (3 cases), and multiple myeloma (8 cases). However, no primary tumor was found in the rest of 17 cases. Among 54 of 93 patients who presented with neurological dysfunction, 16 patients completely paralyzed and others incompletely paralyzed. The follow-up time ranged from 10 to 72 months. RESULTS: Pain was relieved in 87 of 93 patients (93.5%) and neurological function was improved in 47 of the 54 patients. Among 16 completely paralyzed patients, 7 patients experienced a neurological function improvement (from Frankel grade A or B to C or D after decompression). The average amount of blood transfused was 3000 ml. No severe complications were seen in our series. The one-year survival rate was 85% (79 cases). CONCLUSIONS: The integrity of the spinal column structure and neurological function should be considered firstly in the treatment of spinal metastasis. Thorough resection of metastatic tumor and stable internal fixation by anterior approach should be performed when single or two vertebra are involved. In order to alleviate paralysis, promote spinal stability, and improve the quality of life, urgent decompression should be performed on patient with spinal metastasis.

Breast Neoplasms↗

PubMed2004

[Resection and reconstruction for primary pelvic tumors around acetabular].

OBJECTIVE: To discuss the resection of tumors, reconstruction of defects and the postoperative complications. METHODS: Thirty-one patients with tumors around acetabular were treated surgically in People's Hospital between July 1997 and July 2003. The series comprised 19 males and 12 females. Twelve patients were diagnosed with chondrosarcoma, 1 with Ewing sarcoma, 3 with osteosarcoma, 1 with lymphoma, 1 with carcinosarcoma, 1 with malignant fibrohistiocytoma (MFH), 2 with myeloma, 9 with giant cell tumor (GCT), 1 with aneurysmal bone cyst. Among 31 patients with peri-acetabular tumors, 8 were reconstructed with hemi-pelvic prosthesis, 7 with saddle prosthesis, 6 with cauterized tumor bone and total hip arthroplasty, 10 with total hip replacement after curettage of lesion and cemented. RESULTS: Among 21 patients who underwent tumor resection and reconstruction in region II, 6 had local relapse. Two of 3 patients with osteosarcoma were dead. Five of 12 patients with chondrosarcoma were free of disease. Twenty-one patients with acetabular reconstruction after resection of lesions in region II could sit and stand normally and walked with a cane, several of which even had normal gait. CONCLUSION: Allograft or pelvic prosthesis can be used to reconstruct the acetabulum after resection of tumors. We must pay more attention on the following points in the surgical treatment of periacetabular tumors: (1) Extensively resect tumors as far as possible; (2) Be acquainted with advantages and disadvantages of different reconstructive methods of acetabulum to prevent the complications; (3) The reconstructed acetabulum is unstable, so the patients must stand with a cane to protect the reconstructed hip joint; (4) Prevent wound necrosis and infection; (5) Surgical treatment of pelvic tumors would easily result in poor wound healing especially in the patients receiving chemotherapy or radiotherapy because of extensive soft tissue stripping. The destroyed soft tissue caused by chemotherapy or radiotherapy may increase the great tissue tension after implantation of allograft. And the factors of poor blood supply and hematoma in the wound theoretically increase the chance of infection.

Acetabulum↗

PubMed2004

[Neoadjuvant chemotherapy for osteosarcoma].

OBJECTIVE: To summarize the experience in neoadjuvant chemotherapy for osteosarcoma. METHODS: Between July 1996 and December 2002 113 patients, 65 males and 48 females, aged 7 approximately 31, with osteosarcoma located in pelvis (n = 2), sacrum (n = 1), proximal femur (n = 6), shaft of femur (n = 4), distal femur (n = 49), proximal tibia (n = 37), shaft of tibia (n = 2), distal tibia (n = 1), fibula (n = 3), scapula (n = 1), clavicle (n = 1), or proximal humerus, (n = 7) without metastasis, 7 of which being at the Ennecking stage of IIA and 106 of which being at the stage of IIB, underwent 2 cycles of chemotherapy with high dose methotrexate (MTX) preoperatively and then operation. If poor response was observed after the first cycle of chemotherapy MTX was abandoned and operation was performed immediately. Twenty-two patients underwent reimplantation of devitalized tumor bone and 80 patients underwent prosthetic replacement. The protocol of cisplatin, ifosfamide, and paclitaxel was adopted after operation. At least 3 cycles of chemotherapy were given postoperatively for all patients. The patients were followed up for 20 approximately 66 months. RESULTS: Sixty patients showed excellent response to the preoperative chemotherapy, 35 showed good response, and 18 showed poor response. Relapse of tumor was found in 12 out of the 22 patients (55%) receiving reimplantation of devitalized tumor bone and in 5 out of the 60 patients (8.3%) receiving prosthetic replacement. The 5-year survival rate of the whole group was 71.93%. The lung metastasis rates were 18.3%, 37%, and 78% in the preoperative excellent response group, good response group, and poor response group respectively. CONCLUSION: The neoadjuvant chemotherapy protocol with the second-line drugs such as ifosfamide and paclitaxel used to the patients responding poorly to MTX is more effective than the older protocol. Local arterial chemotherapy is feasible.

Adolescent↗

PubMed2004

[Surgery for multiple myeloma of the bone].

OBJECTIVE: To investigate the indication, approach and results of the surgical treatment of multiple myeloma. METHODS: The authors reported 29 surgically-treated patients with solitary or multiple myeloma of the bone between January 1997 and January 2002. There are 17 males and 12 females with average age of 59.5 years (range 38 - 76 years). The primary tumour localizations were: vertebral column in 9, rib in1, humerus in 2, proximal femur in 2, femur shaft in 3, pelvis in 6, sacrum in 6. The 29 patients had undergone the following surgical procedures: vertebral tumours were excited through the anterior or posterior approach, combined with a stabilizing procedure in 7 cases. Tumors on thoracic spine were resected using anterior approach. 4 endoprotheses of replacement were performed, indnding two on proximal femur, one on humerus, and one on pelvis. The pathologic fracture was fixated by internal fixation. Neurological impairment was evaluated according to Frankel system. The study evaluated the complications, neurologic function improvement, life quality, and survival after the surgical treatment. RESULTS: The pain was relieved in all cases and the neurological function was improved after the surgery. Local recurrence were found in three cases during the follow-up time. CONCLUSION: The symptom of the patients can be relieved by the surgery. Our experience suggests that surgical interruption on multiple myeloma in some cases may be rewarding.

Adult↗

PubMed2004

[The mistakes of E. Dinc's double divisor-ratio spectra derivative method].

Double divisor-ratio spectra derivative method has been developed and applied to determining two ternary mixtures simultaneously by E. Dinc. In fact, E. Dinc's double divisor-ratio spectra derivative method is completely wrong. It can not be applied to determining ternary mixtures simultaneously. This paper proves the Mistake of E. Dinc's method in both theory and practice.

Algorithms↗

PubMed2003

[The surgical management of sacral tumors].

OBJECTIVE: To investigate the way of sacral tumors surgical treatment. METHODS: This retrospective study included 119 cases of sacral tumors surgically treated from July, 1996 to December, 2001. The age of patients ranged from 18 to 80 years (mean 57 years), including of 72 male and 47 female. Out of the patients, there were 52 chordomas, 16 giant cell tumor, 5 neurofibroma, 23 metastases tumors, 9 myeloma, 2 osteoblastomas, 5 aneurysmal bone cysts, 3 osteosarcomas, 4 chondrosarcomas. Posterior approach and combined anterior-posterior approach were used in 83 and 36 cases respectively. Twenty-nine patients had received surgical management at least once and 16 of them had received radiation therapy before came to our department. RESULTS: Three patients died on the complication around the surgery. Most of the patients with metastases tumor or multiple myeloma died 1 to 3 years after the surgery. Out of three osteosarcoma patients, 2 died and one alive with tumor. Three chondrosarcoma patients died, and one alive with tumor. Out of 52 chordoma patients, 3 patients had died of metastatic chordoma, 3 patients died of many times recurrence. Among the other 46 patients who were stay alive, 31 were free from disease with average follow-up time of 42 months. In the patients whose sacral nerve roots had been reserved bilaterally at and above S(3) level, the sphincter muscle function of bladder and bowl was good. While the function of sphincter muscle impaired in 2 patients with nerve roots reserved only at and above S(1) level. To manage these 2 patients, indwelling bladder catheters were used, but colostomy had not been performed. CONCLUSIONS: Complete resection of tumor (radical surgery when possible) is the most effective way to manage sacral tumors. Postoperative adjuvant radiation therapy can reduce the tumor recurrence rate, but it also can cause troubles that would hinder further surgical managements. Even if the tumor is relatively huge and the upper resection margin is as high as at S(1) or S(2) level, the tumor can be removed successfully by posterior approach and the postoperative complications could be accepted. To the patients with aneurysmal cyst or giant cell tumor on sacrum, for control bleeding purpose, anterior approach should be performed to ligate the bilateral internal iliac artery.

Adolescent↗

PubMed2003

[Experimental studies on adriamycin alginate-chitosan microcapsules in the treatment of rabbit VX2 carcinoma in the extremity].

OBJECTIVE: To study the effects of chemoembolization with adriamycin alginate-chitosan microcapsules in the treatment of VX2 carcinoma in the extremity of the rabbit. METHODS: Twenty-four New Zealand white rabbits transplanted with VX2 carcinoma cells into the muscle tissue of the lower right thigh were divided into four groups namely groups A, B, C and D, and received regional infusion from femoral artery. Each group consisted of six rabbits: a group given natural saline (Group A), a group given adriamycin (Group B), a group given blank alginate-chitosan microcapsules (Group C) and a group given adriamycin alginate-chitosan microcapsules (Group D). Three days after treatment, all groups were examined by histology and immunohistochemical detection (TdT-mediated dUTP nick end labeling technique, TUNEL; proliferating cell nuclear antigen, PCNA). RESULTS: The blood vessels of the tumor were almost embolized by the microcapsules. Extensive necrosis, high level of positive cells in TUNEL (60.85% +/- 5.21%) and low level in PCNA detection with in the tumors were observed in Group D. CONCLUSION: Adriamycin alginate-chitosan microcapsules can potentially play roles in two respects, 1 to serve as embolizing agents, and 2 to serve as drug delivery vehicles for local release. Chemoembolization with microparticals is an effective treatment of malignant osseous and soft tissue sarcomas in an experimental model.

Alginates↗

PubMed2003

[Clinical study of solitary bone plasmacytoma].

OBJECTIVE: To study the clinical characteristics and the prognosis of solitary bone plasmacytoma (SBP). METHODS: From June 1997 to June 2002, ten SBP patients were treated in our department. Two lesions were in sacrum, two in pelvis, the other six lesions were in proximal femur, femoral diaphyseal, scapula, thoracic vertebra, proximal humus, and rib respectively. The preoperative laboratory tests were normal. Operation was performed on all patients. The pathologic diagnose was plasmacytoma and then they underwent further laboratory examination, urine Bence-Jone protein is positive in 3 patients, serous IgG value was higher than normal in 2 patients, abnormal M protein was found in electrophoresis in 2 patients. All patients received radiotherapy postoperatively. RESULTS: Four patients were excluded, whose follow-up were lessen than ten months, the other six patients's average follow-up is 28.2 months (from 18 to 48 months), one patient who developed multiple myeloma (MM) six months postoperatively received chemotherapy using M2 protocol and died 21 months after operation. The other five patients had disease-free survive and remain solitary bone lesion after the treatment of surgery and radiology. CONCLUSION: Compared with MM, SBP patients are younger, the therapeutic results and prognosis are better. The main prognostic factors include age, the size of lesion, the axial bone lesion, persistence of myeloma protein after radiotherapy, early diagnosis and treatment, and so on.

Bone Neoplasms↗