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Query: UMLS:C0029463 (osteosarcoma)
 16,637 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Morphological studies on sarcomas induced in syrian hamsters by cellfree transmission are described. The tumour tissue for the cellfree preparations stemmed from a sarcoma, containing C-particles. Basically, three histological groups have been distinguished: 1. neoplasms of the peripheral nerve-sheath, 2. undifferentiated sarcomas, and 3. liposarcomas. Furthermore, a rhabdomyosarcoma, an angiosarcoma and, in a heterotransfection on rat, an osteosarcoma have been established. The great majority of tumours could be transmitted by cellfree preparations. To this neoplasms belong the undifferentiated histological structure.
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PMID:[Morphological studies on cellfree induced sarcomas in syrian hamster (author's transl)]. 6 Sep 83

57Co-bleomycin appears to be one of the best tumor detecting agents at the moment. The localization within the cells is not yet known. This preclinical investigation had the aim to study the subcellular distribution of 57Co-bleomycin in liver, spleen and tumors of rats and mice. Mice with transplanted lymphosarcoma and osteosarcoma were used and rats with transplanted rhabdomyosarcoma. The concentration of 57Co-bleomycin was 2 to 10 times higher in the tumors as compared to the (normal) liver. This accumulation property was not found with the control substance: 57CoCl2. The highest radioactivity of 57Co-bleomycin (cpm/mg protein) was observed in subcellular fractions containing mitocohndria and lysosomes. After treatment of these fractions with hypertonic solutions it could be shown that enzymes of the mitochondrial matrix remained inside the vesicles under conditions of almost complete release of 57Co-bleomycin. Half of the lysosomal enzyme acid phosphatase was released too. From these experiments it is concluded that 57Co-bleomycin is preferentially localized in heavy secondary lysomes which are more fragile than the lighter lysosomes in the cells.
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PMID:Subcellular localization of 57Co-bleomycin in normal and tumor tissues. 7 96

Since the first promising results of Nouel et al. 1972, additional positive experience has been obtained with 57Co-Bleomycin (57Co-BLM) as a tumour-localizing agent. In this preclinical study, mice with transplanted osteosarcoma and lymphosarcoma were used and rats with transplanted rhabdomyosarcoma. 57CoCl2 served as a control substance. 57Co-BLM had concentrated in the tumours with a factor 2 to 10 as compared to the (normal) liver of the animals. No preferential concentration in the tumours was found when 57CoCl2 was used. The highest specific activity of 57Co-BLM (cpm/mg protein) was found in a fraction containing mitochondria and lysosomes. Evidence for a lysosomal localization of this diagnostic compound was obtained from experiments in which the mitochondrial-lysosomal fraction was treated with hypertonic media of different osmolarities. Conditions could be found in which many lysosomes burst while almost all mitochondrial were intact. From these experiments it appeared that the radioactivity in the particles obtained from animals injected wtih 57Co-BLM was released very rapidly. It is concluded that 57Co-BLM is preferentially localized in the heavy lysosomes sedimenting together with most of the mitochondria of the cell and that these structures are more fragile than the light lysosomes.
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PMID:Intracellular distribution of 57Co-bleomycin. 7 27

Whole lung computed tomography (CT) was performed on 25 patients with clinical diagnoses including osteogenic sarcoma. Ewing's sarcoma, rhabdomyosarcoma, fibrosarcoma, and melanoma in whom conventional tomography had revealed from one to four parenchymal nodules in one lung deemed resectable for either staging or treatment purposes. Thoracotomy was performed within 3 weeks after conventional and computed whole lung tomography. All palpable nodules were resected, measured at the time of surgery, mapped by anatomic segment, and submitted for individual histologic evaluation. CT defined more nodules than conventional tomography in 48% of cases. The additional nodules were usually pleural or subpleural and 3--6 mn in diameter. CT identified 78% of all resected nodules greater than 3 mm in diameter, compared to 59% using conventional tomography. CT was also of value in detecting bilateral nodules earlier than conventional tomography and in documenting small nodule growth on successive examination. However, 60% of the additional nodules defined by CT and resected proved to be benign granulomas and pleural-based nodes at thoracotomy.
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PMID:Comparison of computed and conventional whole lung tomography in detecting pulmonary nodules: a prospective radiologic-pathologic study. 1642 28

The complement-fixation-inhibition (CFI) test was evaluated as a means of detecting humoral antibodies in cat sera and in human sera to mammalian C-type RNA virus interspecies antigen(s). CFI antibody titers of greater than or equal 1:2 were detected in sera from all tumor bearing (23) and normal cats (23), however, sera from most germ free cats were negative. When the same cat sera were tested for blocking antibody by the paired radioiodine labeled antibody technique the correlation between the radioimmune assay and CFI tests was 85%. Sera from 378 cancer patients and 193 normal people were tested for antibodies to the mammalian oncornavirus interspecies-specific antigen in the CFI test. This test used a rabbit antiserum prepared toward a purified feline leukemia virus (FeLV) interspecies antigen. Disrupted Rauscher murine leukemia virus (RLV) was used as source of interspecies antigen in the CFI test. A significantly (P=0.01) higher number of reactions occurred with sera from patients with lymphosarcoma (70.4%), osteosarcoma (41.0%), reticulum cell sarcoma (56.7%), and rhabdomyosarcoma (31.8%) as opposed to sera from normal individuals (6.2%). Of 51 sera from patients with acute lymphocytic leukemia 23.5% (P=0.05) were reactive. Of the sera from 88 breast cancer patients 22.7% reacted, as opposed to 7.8% of 116 normal females and 13.9% of 43 patients with benign breast disease. CFI antibody titers were shown to be dependent on RLV antigen concentration. Absorption with human A and B red blood cell (RBC) and Forssman antigen did not reduce the CFI titers in human sera whereas absorption with RLV reduced them significantly. By indirect radioimmunoelectrophoresis the antibody in selected human sera was shown to be an IgG.
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PMID:Complement-fixation-inhibition as a test for antibodies in cats and humans to C-type RNA tumor virus antigen. 16 19

One hundred sixteen children with malignant tumors were treated by surgery and additional chemotherapy from 1969 to 1974. The chemotherapy was standardized as far as possible for the commonest tumors of childhood (neuroblastoma, Wilm's tumor rhabdomyosarcoma, osteosarcoma). The results are presented in detail.
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PMID:[Carcinochemotherapy in pediatric surgery (author's transl)]. 17 46

The series consisted of 132 patients, 61 with primary bone sarcomas and 71 with primary soft tissue sarcomas. The patients were all evaluated by lymphography. The investigation included both patients who had not yet been treated and patients with suspected or confirmed metastases. All tumour diagnoses were confirmed microscopically. The findings as regards dissemination were based on clinical examinations, laboratory tests, roentgen examinations and lymphographies. In some cases, lymph node biopsies and surgical observations were also used. A total of 151 lymphographies were performed and 281 follow-up films taken. Preoperative lymphography was performed using the technique introduced by Kinmonth. For postoperative lymphography on the stumps of amputated extremities, two simple but useful methods were developed, which are presented here. Changes in the lymphographic appearance of lymph node metastases, the occurrence of new metastases, and the results of treatment were assessed by survey films and repeat lymphography. The generally accepted criteria for metastasis were used as a basis for the analysis of the lymphographic findings. The results may be summarized as follows: 1. Incidence of lymphatic dissemination. Different sarcomas varied greatly in their clinical course, including the frequency of dissemination. The lymphatic involvement in the metastatic cases was as follows: Bone sarcomas: 16 out of 28 (Table 10); of these, 13 were to regional lymph nodes, 8 to distant nodes and 5 to both (Table 14). Soft tissue sarcomas: 24 out of 40 (Table 11). All 24 had metastases in regional nodes, and 8 in distant nodes as well (Table 15). The highest frequencies of lymphatic spread in the different metastasized tumours were found to be: Bone sarcomas: reticulosarcoma 100%, Ewing's sarcoma 50%, osteosarcoma 47%. Soft tissue sarcomas: rhabdomyosarcoma 100%, synovial sarcoma 80%, neurogenic sarcoma 78%, leiomyosarcoma 67%. 2. Time-relation between lymphatic and haematogenic dissemination; The tendency to metastasize first via the lymphatics or via the blood vessels varied. Half of the cases of Ewing's sarcoma and reticulosarcoma had evidence of lymphatic spread before blood-borne metastases were detected. In the osteosarcoma cases, however, lymphatic dissemination was always preceded by haematogenic spread (Table 12). In synovial sarcoma, rhabdomyosarcoma and neurogenic sarcoma, the first dissemination was more frequently lymphatic than haematogenic (Table 13). 3. Possible existence of special lymphographic features of sarcoma metastases. Only reticulosarcoma displayed special characteristics. The lymph node metastases of reticulosarcoma of bone had lymphographic appearances similar to those found in reticulosarcoma of soft tissue or lymph node origin (Fig. 12). The lymph node metastases of other primary bone and soft tissue sarcomas had no specific lymphographic features and were indistinguishable from carcinomatous metastases (Figs 7, 9, 13, 15, 18, 19, 20, 22, 23). 4...
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PMID:Lymphatic dissemination of bone and soft tissue sarcomas: a lymphographic investigation. 20 99

Undiluted, fivefold-diluted, and 25-fold-diluted doses of a stock of Moloney murine sarcoma virus were injected directly, in a volume of 0.025 ml, into the backs of fetal Sprague-Dawley rats by laparotomy through the uterine wall at 18 days of gestation. During the first 8 weeks after birth the young responded to the virus with remarkably high but dose-dependent incidences of neoplasms. When a one-fifth dilution of the virus preparation was inoculated at fetal ages 16, 18, and 20 days, the incidences of lesions decreased with advancing fetal age. The tumors developed preferentially at the virus inoculation site and/or in the proximal parts of the extremeties; all were considered to be of mesenchymal derivation, i.e., malignant mesenchymoma, rhabdomyosarcoma, osteosarcoma, fibrosarcoma or fibromyxosarcoma, hemangiosarcoma, plasmacytoma, and a giant cell tumor. This injection procedure provided us with a valuable experimental tool for the rapid screening or testing of potential chemical carcinogens and other biologic studies.
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PMID:Enhancement of tumor induction in rats with Moloney murine sarcoma virus by a "new" method based on direct injection into fetuses. 26 91

Moloney murine sarcoma virus (M-MSV) was injected directly into the fetuses of Sprague-Dawley rats during the late stage of gestation and into the neonates within 24 hours after birth. Ninety rats developed 188 neoplastic lesions during the 8-week period of observation. Nearly all of the neoplasms were of mesenchymal derivation. Sixty percent of these neoplasms revealed more complex histologic features than those previously reported for neoplasms induced in rodents with M-MSV and were designated "malignant mesenchymoma" which developed preferentially in the proximal parts of the extremities, distant from the inoculation site. Rhabdomyosarcoma and osteosarcoma which developed in a pure form at the various sites were the next most common tumor type. Osteosarcoma developing in a pure form and as a component of malignant mesenchymoma in the humerus and femur was comparable to that of juxtacortical osteosarcoma of man; The development of excessive bones were observed in the forelimb and/or hind leg, suggesting a type of skeletal malformation. The reaction to M-MSV merits attention as a model for the study of an osteosarcoma and malignant mesenchymoma as well as rhabdomyosarcoma and also for the study of viral teratogenesis in man, as "rubella syndrome".
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PMID:Pathology of neoplasms and other lesions induced in rats with Moloney murine sarcoma virus. 26 56

Children with malignancies resistant to conventional therapy were treated with cis-diamminedichloroplatinum (PDD), 15 to 20 mg/m2, given daily by rapid intravenous infusion for 5 days at 3-wk intervals. Eleven of 24 children with acute lymphocytic leukemia (ALL) received two or more courses; among these no remissions occurred. Fifty-four children with solid tumors were treated: 25 neuroblastoma, 9 rhabdomyosarcoma, 4 Ewing sarcoma, 2 testicular embryonal carcinoma, 2 retinoblastoma, and 12 miscellaneous tumors. One complete remission, 3 partial remissions, and 2 improvements were observed in children with neuroblastoma. One girl with metastatic osteogenic sarcoma achieved a partial remission. One child with metastatic testicular embryonal carcinoma showed improvement. The side effects were vomiting controlled by antiemetics in 26 children and transient elevations of serum creatinine and BUN in 14 children. Nineteen of 39 children with solid tumors, who received more than one course of PDD, had moderately severe myelosuppression caused by PDD. In summary, PDD is a promising agent in neuroblastoma, osteogenic sarcoma, and testicular embryonal carcinoma, and an ineffective agent in ALL. The effect of PDD on other types of solid tumors should be evaluated in the future.
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PMID:Cis-diamminedichloroplatinum (NSC-119875) in childhood malignancies: a Southwest Oncology Group study. 27 32


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