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1.
Oncol Lett ; 13(3): 1835, 2017 Mar.
Article in English | MEDLINE | ID: mdl-28454331

ABSTRACT

The genetics background underlying the aggressiveness of chondrosarcoma (CS) is poorly understood. One possible cause of malignant transformation is chromosomal instability, which involves an error in mitotic segregation due to numerical and/or functional abnormalities of centrosomes. The present study aimed to evaluate centrosome amplification in cryopreserved samples of tumor tissue from patients with CS. An analysis was performed on 3 primary cultures of tumors from patients who underwent surgery between January 2012 and December 2012 at the Department of Orthopedics at the Barretos Cancer Hospital (Barretos, Brazil). Additionally, cryopreserved tumor specimens were analyzed from 10 patients. The data were assessed using immunocytochemistry and immunohistochemistry staining techniques with monoclonal antibody anti-γ-tubulin. A total of 4 samples of CS cultured cells were obtained from 3 patients. A recurrence of a histological grade III tumor was detected in a female patient with Ollier's syndrome. The other 2 cases were grade I and III. The incidence of centrosome amplification in the primary cultures ranged from 15-64% of the cells. Whereas control cultured fibroblasts showed baseline levels of 4% amplified cells. For the cryopreserved specimens, two independent observers analyzed each sample and counted the cells stained with γ-tubulin, verifying the percentage of affected cells to be a mean of 14%, with the number of clusters ranging between 0-6 per slide. In conclusion, centrosome amplification was found to be a consistent biological feature of CS and may underlie chromosomal instability in this tumor.

2.
Acta ortop. bras ; 19(6): 328-332, 2011. ilus, tab
Article in Portuguese | LILACS | ID: lil-610486

ABSTRACT

OBJETIVO: Demonstrar a experiência de uma única instituição em hemipelvectomias internas sem reconstrução. Avaliar as cirurgias pélvicas preservadoras e as amputações interílio-abdominais e seu prognóstico. MÉTODOS: 21 pacientes com tumores primitivos pélvicos submetidos à hemipelvectomia com ou sem preservação de membro. Sete foram tratados com hemipelvectomias externas (amputação) e 14 com internas, entre junho de 2004 e julho de 2009. A classificação cirúrgica utilizada foi a de Enneking para tumores pélvicos. O método de avaliação funcional foi o escore de ISOLS/MSTS. RESULTADOS: A sobrevida dos pacientes em dois anos foi de 63,9 por cento. A média de sobrevida do grupo todo foi de 43 meses. A avaliação funcional demonstrou que as hemipelvectomias preservadoras com ressecção do osso inominado obtiveram 12,5 por cento, 62,5 por cento e 25 por cento de resultados ruins, bons e excelentes, respectivamente. Nos casos em que o osso inominado foi preservado, os resultados foram 16,7 por cento e 83,3 por cento bons e excelentes, respectivamente. CONCLUSÕES: A hemipelvectomia é procedimento pouco usual e causador de importante limitação funcional e comorbidades. A alternativa de ressecar a hemipelve sem reconstrução tem demonstrado resultados tão bons quanto a não-reconstrução. Os elevados custos médicos, além das possíveis complicações com uso de enxerto e próteses justificam a técnica empregada neste artigo. Nível de Evidência IV, Estudo de caso-controle.


OBJECTIVE: To describe the experience of one single institution in internal hemipelvectomies without reconstruction and external hemipelvectomies. METHODS: Twenty-one patients with primary tumors of the pelvic region underwent total hemipelvectomy, at Barretos Cancer Hospital, São Paulo, Brazil, between 2004 and July 2009. Of these, seven were treated with external hemipelvectomy (classic) and 14 with internal hemipelvectomy. Evaluation was done based on Enneking's surgical classification for internal hemipelvectomy. RESULTS: Overal survival in two years was 63,9 percent. Median survival of 43 months. Functional outcomes demonstrated that procedures with inominate bone ressection reached 12,5 percent, 62,5 percent and 25 percent of bad, good and excellent results, respectively. When inominate bone was preserved the results were 16,7 percent and 83,3 percent good and excellent, respectively. No endoprosthesis or bone graft reconstructions were done. CONCLUSIONS: Hemipelvectomy is an unusual procedure that is rarely performed because it is infrequently indicated and because of its high morbidity rate. In some reports, the morbidity rate has reached 77 percent of the cases. We did not perform any type of reconstruction or arthrodesis based on complications and the experience of good results with this method. Our results are similar to the main reports and are still subject of discussion by the oncologic surgeons. Level of evidence IV, Case-control study.


Subject(s)
Humans , Male , Female , Amputation, Surgical , Hemipelvectomy , Pelvic Neoplasms/diagnosis , Pelvic Neoplasms/rehabilitation , Soft Tissue Neoplasms/surgery , Soft Tissue Neoplasms , Brazil , Pelvic Neoplasms/mortality , Sacroiliac Joint , Survival Rate
3.
Hansen. int ; 25(1): 7-16, jan.-jul. 2000. tab, graf
Article in Portuguese | LILACS, Sec. Est. Saúde SP | ID: lil-281485

ABSTRACT

A hanseníase seria uma doença comum se näo fosse por seus episódios reacionais de risco de incapacidades mantendo o estigma relacionado à "lepra". Essas reaçöes e a perda potencial da funçäo neural podem ocorrer antes, durante e após o tratamento, feito com poliquimioterapia (PQT). A alta por cura se dá pelo número de doses e regularidades do tratamento, quando o paciente sai do registro ativo e dos coeficientes de prevalência. Objetivando avaliar a magnitude das reaçöes hansênicas pós-alta e as questöes operacionais referentes a qualidade da asssistência, foram revisados prontuários de 149 pacientes que receberam alta de hanseníase de 1994 a 1999, no Centro de Saúde Escola Jaraguá - UFU, realizando a ficha de investigaçäo de Intercorrências Pós-Alta por Cura do Ministério da Saúde. Destes, 34 (23 por cento) apresentaram reaçäo pós-alta, sendo 11,76(por cento) PB e 88,23(por cento) MB. Ocorreu uma média de 3 episódios por paciente dimorfo e 4 por paciente virchowiano


Subject(s)
Homebound Persons/education , Leprosy , Delivery of Health Care , Patient Discharge , Homeopathic Therapeutic Approaches
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