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Biomedical subjects

V A Bizer

Publications and source records attributed to V A Bizer.

17 recordsLinked to original sources
PubMed1992

[The rehabilitative treatment of children with bone sarcomas].

The paper deals with the experience gained in carrying out rehabilitative surgery in 33 infant patients (37 operations) with bone sarcoma within 12 months to 12 years after combined treatment of primary tumor. Twenty-two operations using procedures of compression-distraction osteosynthesis were performed in 18 patients for post-surgery development of bone deformities and shorter limbs. shortening. Advantages of compression-distraction procedures are discussed since their application allows to make incisions and remove bone in areas outside the zone of radiation injury and permanent monitoring of exposed soft tissue condition. Twenty-two infants survived 5 years after orthopedic treatment. Four children died from metastases into the lungs 1-4 years after orthopedic rehabilitation.

Adolescent↗
PubMed1990

[Osteogenic sarcoma in children: clinico-immunological correlations].

Initial immunologic status in children suffering osteogenic sarcoma was retrospectively evaluated versus such parameters as site and extent of tumor, and clinical course. A complex of disorders in the immunologic system was established in osteogenic sarcoma patients. Such characteristics as levels of active, theophylline--sensitive and levamisole--reactivated T-cells were found clinically valuable and prognostically significant. These parameters may betray response of high- and low-affinity E-receptors of lymphocytes to serum factors of tumor growth.

Adolescent↗
PubMed1990

[Orthopedic rehabilitation of children after combined treatment of malignant bone tumors].

The report is based on the data concerning 27 children who were given radiotherapy and chemotherapy for osteogenic sarcomas (14), Ewing's sarcomas and reticulosarcoma (10) and malignant giant cell tumours (2). The reconstructive conservative treatment (7 patients) were referred for prevention of contractures and fractures. The orthopaedic surgical correction of the appearing false joints, deformations and defects of the bones (20 patients) was performed 4 to 5 years after the termination of the primary treatment. During the reconstructive period 3 patients with malignant giant cell tumours and osteogenic sarcoma died because of metastases. The authors have made a conclusion about the advantage of extrafocal compression and distraction osteosynthesis over other methods of fixation and correction of deformations in children after the treatment of malignant bone tumours.

Adolescent↗
PubMed1989

[The immunomodulating action of combined therapy together with local UHF hyperthermia in osteogenic sarcoma in children].

The paper is concerned with immunological evaluation of different stages of combined therapy with local UHF hyperthermia in children with osteogenic sarcoma. Combined therapy (polychemo- and radiotherapy) was shown to cause a decrease in the number of immunocompetent cells, to enhance imbalance of immunoregulatory T-lymphocytes, to weaken T-lymphocyte function on PHA; immunosuppressive action of combined therapy did not depend on a tumor site. The incorporation of UHF-hyperthermia in the therapeutic scheme weakened the manifestations of secondary immunodeficiency, got back to normal the structure of T-lymphocyte population. A favorable immunomodulating effect of hyperthermia was more frequently observed in patients with crural bone tumors. The effect of hyperthermia was revealed after direct influence of thermotherapy but it was absent in continuation of combined treatment.

Adolescent↗
PubMed1989

[Combined treatment of patients with osteogenic sarcoma using local UHF-hyperthermia].

The authors present their results of combined treatment of 85 patients with osteogenic sarcoma. The results are analysed according to the method of treatment in 3 groups of the patients who had been administered different total focus doses acting on the tumour. Besides chemical and radial therapy and surgical treatment local UHF-hyperthermia was used as a modifier in the complex of therapeutic measures. It has been demonstrated that the use of local UHF-hyperthermia does not increase the risk of metastatic spreading, allows to reduce the radiation dose and by influencing the primary tumour contributes to better treatment results.

Antibiotics, Antineoplastic↗
PubMed1979

[Therapeutic use of carminomycin in Ewing's sarcoma in children].

The therapeutic effect of carminomycin in various combinations with other antitumor drugs, i. e. vincristin, cyclophosphan, dactinomycin and metatrexate was studied in clinics on 18 children with wide-spread Juing sarcoma. Satisfactory direct effect was observed with the use of the above combinations in 47.0 per cent of the patients, which was evident from a decrease in the secondary tumor, disappearance of the pains and improvement of the general state of the patients.

Antibiotics, Antineoplastic↗
PubMed1979

[Use of carminomycin on children and adolescents with osteogenic sarcoma].

The therapeutic effect of carminomycin was studied in clinic at different treatment schemes with respect to 14 children and juvenile patients with osteogenic sarcoma. Pronounced local effect evident from disappearance of the pain and in some cases decrease of the metastatic tumor were noted in the patients with metastases of the osteogenic sarcoma to the bones or relapses of the primary tumor. Subjective improvement and objective effect were observed respectively in 90 and 53 per cent of the patients with metastases into the lungs and pronounced lung symptomatology.

Adolescent↗
PubMed1978

[Multipotent primary bone sarcoma].

The results of clinical and roentgen-morphological studies on 17 cases of multipotent primary sarcoma of the bone are presented. The difficulties of the tumor recognition are due to the fact that it occurs rarely, has no specific clinical-roentgenological picture and shows marked tissue polymorphism. Most frequent are differentiations of the type of osteogenic sarcoma, chondrosarcoma, reticulosarcoma with simultaneous combination with areas having the structure of Ewing's tumor, or extensive fields of undifferentiated primitive tumor cells. Further studies are necessary to decide whether or not this tumor is an independent form among other known skeletal neoplasias.

Adolescent↗
PubMed1978

[Bone tumor macroelements].

Neutron-activation method was employed to determine the concentration of magnium, sodium, chlorine, phosphorus and calcium in different bone tumors. In relation to normal skeletal tissue in tumor tissues higher concentrations of chlorine and sodium but lower concentrations of calcium and phosphorus were found. The greatest changes in the macromolecular content were noted in sarcoma tissues. Bone tumors differ reliably one from the other by concentrations or ratios of macroelements concentrations, this fact may be used for the differential diagnosis.

Adolescent↗
PubMed1977

[Clinical aspects and treatment of chondrosarcoma in children and adolescents].

The clinical cours and treatment of chondrosarcoma in 9 children, aged from 8 to 16 years, are analysed. Only provisional and not persistant effect was gained after roentgenotherapy. Resection of the bone with tumor removal also failed to provide radical intervention in all patients, but one, and recurrences were noted 3-12 months following the resection. However, chondrosarcoma in children is continuously observed to be a local process and is characterized by late metastasization, due to that its prognosis is more favourable than in other malignant bone tumors.

Adolescent↗