Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0029463 (osteosarcoma)
 16,637 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

This case-control study investigates etiologically important factors for juvenile osteosarcomas and possible reasons for the relative scarcity of their incidence in the population. Information on a variety of risk factors, psychosocial factors, and factors possibly occurring in early childhood was obtained by interviewing 88 patients (ages 8-25 years) with osteosarcoma, Ewing's sarcomas and other bone tumors, and three age- and sex-matched control groups (hospital, neighbour and family controls), and their mothers. For both sexes, children's diseases in their history, which increased the risk were measles (RR = 1.56, not significant) and mumps (RR = 1.81, 95% CI = 1.05-3.13), whereas clinically apparent chickenpox was associated with a significant decrease for bone tumors (RR = 0.46, 95% CI = 0.26-0.8). Dermal and respiratory allergies (without hay fever) were also inversely associated with bone tumors. Breast feeding for longer than 2 months was associated with low risk for bone tumors for boys, whereas for girls, paternal age was a risk factor; remaining stable in a multivariate model (RR = 2.36, 95% CI = 0.90-6.21). A change in the presence of an emotionally significant person or changes of residence were risk factors both in univariate and multivariate analyses. The strongest and most persistent risk factor was difficulties in school, indicative of emotional disturbances (RR = 2.58, 95% CI = 1.39-4.78). Considering such host factors as possibly important modifiers of risk in addition to exogenous carcinogenic agents, these factors were consistent and statistically significant for both sexes and despite the small numbers recruited for this study, thus predicting susceptibility. The factors may become relevant for preventive psychotherapy applied to susceptible persons for improvement of prognosis after surgical therapy in preventing recurrences.
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PMID:Factors affecting the incident juvenile bone tumors in an Austrian case-control study. 1522 95

Endoglin (CD105, an accessory component of the TGF-beta receptor complex) expression and distribution on different human tumour cells and its role in cellular proliferation were evaluated. We examined: 1) sixteen human carcinoma cell lines, 2) eight human sarcoma cell lines, 3) five miscellaneous tumour cell lines. HECV (endothelial cells) were employed as a positive control for endoglin expression. Normal Human Dermal Fibroblasts (NHDF) and 293 cells (epithelial kidney cells) were used as normal controls for connective and epithelial tissues, respectively. The results showed that CD105 was poorly expressed in the majority of human carcinoma cells (10/16), whereas it was highly expressed in most human sarcoma cells (7/8), and differently expressed by miscellaneous tumour cell lines. These data reflect endoglin expression by the normal counterparts of tumour cell lines, i.e. NHDF and 293 cells. However, CD105 levels in sarcoma cell lines, even though consistently lower than in NHDF, were significantly higher than those observed in carcinoma cells. Interestingly, CD105 presented a strong expression in the cytoplasm of MDA-MB-453 (breast carcinoma), NPA (papillary thyroid carcinoma), COLO-853 (melanoma) and SaOS-2 (osteosarcoma), but was weakly expressed on their cell membrane. This differential expression in the cytoplasm and on the membrane of some tumour cells, suggests a complex mechanism of translocation for this protein. The analysis of clonal growth in soft agar of some cell lines, characterized by high CD105 expression, showed an increased colony formation potential that was antagonized by the addition of anti-CD105 blocking mAb. The results indicated that endoglin is differentially expressed in human carcinoma and sarcoma cells and its overexpression modulates the proliferative rate of human solid tumour cells. Moreover, these data suggest that CD105 is involved in the regulation of TGF-beta effects in human solid malignancies, and therefore it could play an important role in tumour diagnosis and treatment.
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PMID:Differential expression and cytoplasm/membrane distribution of endoglin (CD105) in human tumour cell lines: Implications in the modulation of cell proliferation. 1580 9

Dermal or subcutaneous involvement of extraskeletal osteosarcoma is uncommon, and primary cutaneous osteosarcoma of the skin is even rarer, with only few cases well characterized. The authors present 2 cases of this infrequent skin neoplasm. A 76-year-old woman with a nodule on left malar area and an 82-year-old man with a hard nodule on the right temple. First patient's biopsy findings were a dermal lesion mostly composed of malignant osteoid material, with atypical rhabdoid cells intermingled, which was diagnostic of osteoblastic osteosarcoma. Excision of the lesion of the second patient showed a dermal proliferation of atypical spindle-shaped and pleomorphic cells, scattered multinucleated osteoclasts-like cells, and irregular malignant osteoid material. In some fields, atypical cells showed a pseudovascular pattern. Close to this exophytic lesion, a small nest of basal cell carcinoma was observed. Final diagnosis was collision of osteoblastic and telangiectatic primary osteosarcoma and superficial basal cell carcinoma. Both patients have not presented recurrence or metastatic disease after 12 and 9 months of follow-up, respectively. Clinical and histopathologic characteristics of the primary cutaneous osteosarcoma are summarized, and the differential diagnosis of this entity with other benign and malignant skin neoplasms, which can, eventually, show osteoid material.
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PMID:Primary cutaneous osteosarcoma of the skin: a report of 2 cases with emphasis on the differential diagnoses. 2350 16