Quantitative expression evaluation of PRAME gene in osteosarcoma.

BACKGROUND: In a previous study, our group observed that 68% of the osteosarcoma (OS) samples presented PRAME (Preferentially Expressed Antigen in Melanoma) gene expression. In this work, we propose to investigate quantitatively gene expression of PRAME in distinct patients groups. METHODS AND RESULTS: 61 osteosarcoma samples, from 3 distinct patients groups were selected for this study: (1) Patients younger than 10 years old at diagnosis, (2) Patients that had poor evolution of disease and (3) Patients that were in remission of disease and had treatment with no intercurrences) PRAME gene expression levels were obtained using quantitative Real-Time Polymerase Chain Reaction method (qRT-PCR). Clinical parameters were collected from patient's medical charts. Results demonstrated an increase in PRAME gene expression in all samples, with high variation in expression levels, when considering all samples and when analyzed in each group. In addition, no statistical difference was found when considering clinical data collected or patients groups. CONCLUSION: PRAME gene expression quantitative investigation did not bring any complementary information beyond of what had already been observed in other qualitative investigations published by our group, there is no relation between PRAME gene expression levels and disease evolution. However, the findings in this work contribute for validation PRAME gene expression as a good biomarker to OS, which, in the future, may allow identification circulating tumor cell or molecules to contribute with early diagnostic of metastasis, a genuine problem in OS that determinate flattening in survival curves.

MAPK7 variants related to prognosis and chemotherapy response in osteosarcoma.

Osteosarcoma (OS) is a class of cancer originating from the bone, affecting mainly children and young adults. Our previous study showed that MAPK7 gene overexpression was significantly associated with tumor progression, poor treatment response, and worse overall survival, suggesting that MAPK7 could play an important role in OS tumorigenesis. We have investigated if MAPK7 overexpression was a result of any genomic changes in OS tumor specimens. We identified five SNPs (Single Nucleotide Polymorphism) previously described in databases, dbSNP and COSMIC, and identified two single nucleotide substitution not yet described. We found, in prechemotherapy specimens, a significant association of MAPK7 rs2233072G allele variant with metastasis at diagnosis and relapse (0.0909 and 0.0455, respectively). In post-chemotherapy, rs1054206GG specimen's genotype was associated with osteoblastic histological type (P= 0.0249) and presented decreased MAPK7 gene expression when compared with pre-chemotherapy specimens of same patients (P = 0.0095). Interestingly, it was observed some SNPs genotype exchange after chemotherapy. Our data indicated that MAPK7 gene expression associated with genotype exchange after chemotherapy, and these SNPs associated with important clinical parameters might be a valuable indicator for predicting in OS.

MAPK pathways regulation by DUSP1 in the development of osteosarcoma: Potential markers and therapeutic targets.

Osteosarcoma (OS) is the most frequent primary bone tumor that affect children and adolescents. This tumor is highly aggressive with high risk of metastasis and the implementation of new drugs has not been successful. The search for biomarkers or new therapeutic targets is urgently needed and can help in advances of OS treatment. MAPKs are major signaling transduction molecules that play an important role in regulating a variety of cellular responses. DUSP1 is a phosphatase that dephosphorylates the MAPKs. Both MAPKs and DUSPs have been implicated as major modulators of critical signaling pathways that are dysregulated in various diseases. In a previous study, we found an increase in MAPK7 gene expression contributed for worst overall survival and treatment response. We analyzed gene expression of MAPK pathways that participate in MAPK7 regulation, and DUSP1 gene using paired 28 pre/post-chemotherapy and 12 metastasis OS samples. To understand the DUSP1 role in the pathogenesis of OS, we assessed the function of DUSP1 in four OS cell lines through a series of cellular assays combined with gene silencing technique. Our findings showed increased MAP2K6, MAP4K3, and DUSP1 gene expression in post-chemotherapy OS samples presenting poor prognosis. We also found that the suppression of DUSP1 gene expression resulted in decreased proliferation, migration, and invasion in OS cells. These results suggest that members of MAPK family may be possible prognostic markers in OS and DUSP1 has a relevant role in the OS pathogenesis and can be an attractive therapeutic target in new strategies of OS treatment.

CYP genes in osteosarcoma: Their role in tumorigenesis, pulmonary metastatic microenvironment and treatment response.

Osteosarcoma (OS) is the most common malignant bone tumor in children and adolescents. The present study investigated the expression of Cytochrome P-450 (CYP) genes: CYP1A2, CYP3A4 and CYP3A5 by qRT-PCR in 135 specimens obtained from OS patients, including biopsy (pre-chemotherapy), tumor resected in surgery (post-chemotherapy), adjacent bone to tumor (nonmalignant tissue), pulmonary metastasis and adjacent lung to metastasis (nonmalignant tissue). Normal bone and normal lung tissues were used as control. We also investigated in five OS cell lines the modulation of CYPs expression by cisplatin, doxorubicin and methotrexate. As result, the adjacent lung specimens presented CYP1A2 overexpression compared to the normal lung (p=0.0256). Biopsy specimens presented lower CYP3A4 expression than normal bone (p=0.0314). The overexpression of both CYP1A2 and CYP3A4 in post-chemotherapy specimens were correlated with better event free-survival (p=0.0244) and good response (p=0.0484), respectively. Furthermore, in vitro assays revealed that CYP1A2 was upregulated by doxorubicin (p=0.0034); CYP3A4 was upregulated by cisplatin, doxorubicin and methotrexate (p=0.0004, p=0.0024, p<0.0001, respectively); and CYP3A5 was downregulated by doxorubicin (p=0.0285) and upregulated in time-dependent manner by methotrexate (p=0.0239). In conclusion, our findings suggest that CYP genes play an important role in OS tumorigenesis, at primary and metastatic sites, as well in treatment response.

Translation into Portuguese, cross-cultural adaptation and validation of "The European Organization for Research and Treatment of Cancer-Quality of Life Questionnaire-Bone Metastases-22".

BACKGROUND: The aim of the present study was to conduct a cross-cultural adaptation (with translation into Brazilian Portuguese) and validation of the European Organization for Research and Treatment of Cancer-Quality of Life Questionnaire-Bone Metastases-22 (EORTC QLQ-BM22). METHODS: Ninety-five bone metastasis patients (31 men and 64 women, mean age 58.36±8.90 years) took part in the investigation. The translation guide of the EORTC was used to translate from English into Brazilian Portuguese and adapt the instrument culturally. The reliability and the face, content and construct validities were tested. RESULTS: Internal consistency was estimated using Cronbach's alpha for the total score, pain and functional subscales of the EORTC QLQ-BM22 (0.93, 0.86, 0.90). Reliability was analyzed by Pearson's correlation and intraclass correlation coefficients (ICCs). The correlations were higher than the recommended value of 0.75, which indicated good test-retest reliability. Construct validity was demonstrated by correlation with the questionnaire medical outcome study questionnaire 36-Item Short Form Survey (SF-36). It showed significant correlation between the fields of QLQ-BM22 and the SF-36 (P≤0.001). CONCLUSIONS: The EORTC QLQ-BM22 was translated into Brazilian Portuguese, was culturally adapted and was proven to be reliable, with face, content and construct validity.

Computed tomography-guided percutaneous trephine removal of the nidus in osteoid osteoma patients: experience of a single center in Brazil.

OBJECTIVE: To report the results of computed tomography (CT)-guided percutaneous resection of the nidus in 18 cases of osteoid osteoma. MATERIALS AND METHODS: The medical records of 18 cases of osteoid osteoma in children, adolescents and young adults, who underwent CT-guided removal of the nidus between November, 2004 and March, 2009 were reviewed retrospectively for demographic data, lesion site, clinical outcome and complications after procedure. RESULTS: Clinical follow-up was available for all cases at a median of 29 months (range 6-60 months). No persistence of pre-procedural pain was noted on 17 patients. Only one patient experienced recurrence of symptoms 12 months after percutaneous resection, and was successfully retreated by the same technique, resulting in a secondary success rate of 18/18 (100%). CONCLUSION: CT-guided removal or destruction of the nidus is a safe and effective alternative to surgical resection of the osteoid osteoma nidus.

OBJETIVO: Avaliar os resultados da ressecção percutânea do nidus guiada por tomografia computadorizada em 18 casos de osteoma osteoide. MATERIAIS E MÉTODOS: Os prontuários médicos de 18 crianças, adolescentes e adultos jovens diagnosticados com osteoma osteoide e submetidos a ressecção percutânea do nidus guiada por TC, entre novembro de 2004 e março de 2009, foram revisados retrospectivamente para coleta de dados demográficos, local da lesão, evolução clínica e complicações após o procedimento. RESULTADOS: A mediana de tempo de seguimento de todos os pacientes foi 29 meses (intervalo de 6­60 meses). Dezessete pacientes não apresentaram recorrência da dor no pós-operatório. Apenas um paciente teve recorrência dos sintomas 12 meses após a ressecção percutânea e foi retratado com sucesso, pela mesma técnica, resultando numa taxa de sucesso secundário de 18/18 (100%). CONCLUSÃO: A ressecção guiada por tomografia computadorizada do nidus é uma alternativa segura e eficaz para a ressecção cirúrgica do nidus em pacientes com osteoma osteoide.

Epidemiological characteristics of patients with pelvic tumors submitted to surgical treatment / Características epidemiológicas dos pacientes com tumores pélvicos submetidos a tratamento cirúrgico

ABSTRACT Objective: Describe the epidemiological profile of patients with primary or secondary neoplastic lesions in the pelvis who required a surgical procedure such as hemipelvectomy. Methods: This study retrospectively evaluated 69 patients located in the database of a São Paulo educational institution, subject to surgical hemipelvectomy treatment between January 1990 and December 2013. All patients had previous diagnosis of bone tumor (primary or metastatic) in the pelvis (ilium, ischium, pubis, and/or sacrum). Results: Analyzing the data obtained in this study, it was observed that these are partly similar to those found in the literature, with primary bone malignancies as the main diagnosis; general injuries affecting the pelvic area I (pelvic bone) and its most frequent complication, infection. The differences are mainly due to rarity of the bone tumors evaluated in this study, and the type of surgical procedure in question, which is even more unusual. Conclusion: Building a picture that conveys the reality of each diagnosis and that indicates which characteristics of these patients would better resemble an absolute or relative indication for the realization of hemipelvectomy is harder by the rarity of these cases.

RESUMO Objetivo: Traçar o perfil epidemiológico dos pacientes com lesões neoplásicas na pelve, primárias ou secundárias, para as quais foi necessário procedimento cirúrgico do tipo hemipelvectomia. Métodos: Foram avaliados, retrospectivamente, 69 pacientes localizados no banco de dados de uma instituição de ensino de São Paulo, submetidos a tratamento cirúrgico tipo hemipelvectomia entre janeiro de 1990 e dezembro de 2013. Todos os pacientes apresentavam diagnóstico prévio de tumor ósseo (primário ou metastático) na pelve (ílio, ísquio, púbis e/ou sacro). Resultados: Ao analisar os dados obtidos no presente estudo, observou-se que esses são em parte semelhantes aos encontrados na literatura mundial, apresentam como principal diagnóstico as neoplasias malignas ósseas primárias. Em geral, as lesões acometeram a zona I pélvica (osso ilíaco) e a complicação mais frequentemente observada foi a infecção. As diferenças encontradas são devidas principalmente à raridade dos tumores ósseos avaliados nesses estudos e ao tipo de procedimento cirúrgico em questão, esses ainda mais incomuns. Conclusão: Construir um panorama que transmita a realidade de cada diagnóstico e indique quais as características que esses pacientes apresentam que mais se aproximariam como indicações relativas ou absolutas para o procedimento de hemipelvectomia encontra na raridade desses casos o seu maior obstáculo.

Epidemiology of total hip and knee replacement: a cross-sectional study.

OBJECTIVE: To describe the epidemiologic characteristics and adverse events of patients submitted to total hip and total knee replacement. METHODS: A cross-sectional study retrospectively assessing medical chart data of all total hip and total knee replacements performed at a private hospital, between January 2007 and December 2010 Patients submitted to total hip and total knee replacement, with consent of surgeons were included. Incomplete records and/or missing data of the hospital database were excluded. The categorical variables analyzed were age, gender, type of arthroplasty (primary or secondary), type of procedure, duration of surgery, use of drains, risk of infection, compliance to protocol for prevention of deep venous thrombosis and embolism pulmonary, and compliance to the protocol for prevention of infection. The outcomes assessed were adverse events after surgery. RESULTS: A total of 510 patients were included; in that, 166 admissions for knee replacements (92 male) and 344 admissions for hip replacements (176 female). The mean age of patients was 71 years (range 31-99 years). Adverse events were reported in 76 patients (14.9%); there was no correlation between assessed variables and number of complications. CONCLUSION: The results showed no individual factors favoring complications in patients submitted to total hip and total knee replacement; hence, surgeons should consider prophylaxis to avoid complications.

The metastatic behavior of osteosarcoma by gene expression and cytogenetic analyses.

Osteosarcoma is a malignant bone tumor with high metastatic potential. Metastasis at diagnosis is the most significant prognostic factor in predicting the clinical outcome of osteosarcoma. We compared the gene expression of metastases that were present at the time of initial diagnosis to those developed later in the course of the disease. We used quantitative real-time polymerase chain reaction to evaluate the gene expression of MDM2, CXCR4, RANKL, RB1, and OSTERIX in 98 samples of osteosarcoma taken from 47 patients (74 metastases and 24 primary tumors) and 30 nonmalignant lung tissues surrounding osteosarcoma metastases. In addition, we investigated the copy number changes of RB1 and MDM2 genes in 12 primary cultures of pulmonary metastases of osteosarcoma, using interphase fluorescence in situ hybridization. Metastases from metastatic patients at diagnosis were characterized by low expression of RB1 and RANKL (P = .0009 and P = .0109, respectively) and overexpression of CXCR4 and MDM2 (P = .0389 and P = .0325, respectively). The loss of RANKL and gain of CXCR4 could also be detected in the primary tumors of metastatic patients at diagnosis (P = .0121 and P = .0264, respectively). Thus, some early genetic events such as the loss of RANKL and the gain of CXCR4 expressions probably facilitate the metastatic progression concomitant with the primary tumor establishment, supporting the role of the CXCR4 receptor in directing osteosarcoma metastases to the lung. On the other hand, late events such as the loss of RB1 and gain of MDM2, crucial regulators of cell cycle, appear to be related to the final mechanisms contributing to the metastatic establishment of osteosarcoma.

Computed tomography-guided percutaneous trephine removal of the nidus in osteoid osteoma patients: experience of a single center in Brazil / Remoção percutânea guiada por tomografia computadorizada do nidus em paciente com osteoma osteoide: experiência de um único centro no Brasil

AbstractObjective:To report the results of computed tomography (CT)-guided percutaneous resection of the nidus in 18 cases of osteoid osteoma.Materials and Methods:The medical records of 18 cases of osteoid osteoma in children, adolescents and young adults, who underwent CT-guided removal of the nidus between November, 2004 and March, 2009 were reviewed retrospectively for demographic data, lesion site, clinical outcome and complications after procedure.Results:Clinical follow-up was available for all cases at a median of 29 months (range 6–60 months). No persistence of pre-procedural pain was noted on 17 patients. Only one patient experienced recurrence of symptoms 12 months after percutaneous resection, and was successfully retreated by the same technique, resulting in a secondary success rate of 18/18 (100%).Conclusion:CT-guided removal or destruction of the nidus is a safe and effective alternative to surgical resection of the osteoid osteoma nidus.

ResumoObjetivo:Avaliar os resultados da ressecção percutânea do nidus guiada por tomografia computadorizada em 18 casos de osteoma osteoide.Materiais e Métodos:Os prontuários médicos de 18 crianças, adolescentes e adultos jovens diagnosticados com osteoma osteoide e submetidos a ressecção percutânea do nidus guiada por TC, entre novembro de 2004 e março de 2009, foram revisados retrospectivamente para coleta de dados demográficos, local da lesão, evolução clínica e complicações após o procedimento.Resultados:A mediana de tempo de seguimento de todos os pacientes foi 29 meses (intervalo de 6–60 meses). Dezessete pacientes não apresentaram recorrência da dor no pós-operatório. Apenas um paciente teve recorrência dos sintomas 12 meses após a ressecção percutânea e foi retratado com sucesso, pela mesma técnica, resultando numa taxa de sucesso secundário de 18/18 (100%).Conclusão:A ressecção guiada por tomografia computadorizada do nidus é uma alternativa segura e eficaz para a ressecção cirúrgica do nidus em pacientes com osteoma osteoide.

Epidemiology of total hip and knee replacement: a cross-sectional study / Epidemiologia da artroplastia total de quadril e de joelho: estudo transversal

OBJECTIVE: To describe the epidemiologic characteristics and adverse events of patients submitted to total hip and total knee replacement. METHODS: A cross-sectional study retrospectively assessing medical chart data of all total hip and total knee replacements performed at a private hospital, between January 2007 and December 2010 Patients submitted to total hip and total knee replacement, with consent of surgeons were included. Incomplete records and/or missing data of the hospital database were excluded. The categorical variables analyzed were age, gender, type of arthroplasty (primary or secondary), type of procedure, duration of surgery, use of drains, risk of infection, compliance to protocol for prevention of deep venous thrombosis and embolism pulmonary, and compliance to the protocol for prevention of infection. The outcomes assessed were adverse events after surgery. RESULTS: A total of 510 patients were included; in that, 166 admissions for knee replacements (92 male) and 344 admissions for hip replacements (176 female). The mean age of patients was 71 years (range 31-99 years). Adverse events were reported in 76 patients (14.9%); there was no correlation between assessed variables and number of complications. CONCLUSION: The results showed no individual factors favoring complications in patients submitted to total hip and total knee replacement; hence, surgeons should consider prophylaxis to avoid complications.

OBJETIVO: Descrever as características epidemiológicas e os eventos adversos dos pacientes submetidos aos procedimentos de artroplastia de quadril e joelho. MÉTODOS: Estudo transversal, com avaliação retrospectiva de prontuários médicos de todas artroplastias de quadril e de joelho realizadas entre janeiro de 2007 e dezembro de 2010, em hospital privado. Foram incluídos pacientes adultos submetidos à artroplastia total do quadril ou do joelho, com anuência dos cirurgiões. Foram excluídos os pacientes com prontuários incompletos ou perdidos na base de dados do hospital. As variáveis categóricas analisadas foram: idade, gênero, tipo de artroplastia (primária ou secundária), tipo de procedimento, tempo de cirurgia, uso de drenos, risco de infecção, adesão ao protocolo para prevenção de trombose venosa profunda e embolia pulmonar, e adesão ao protocolo para prevenção de infecção. Os desfechos avaliados dos pacientes foram eventos adversos ocorridos após a cirurgia. RESULTADOS: Foram incluídos 510 pacientes, sendo 166 hospitalizações para artroplastia do joelho (92 do gênero masculino) e 344 hospitalizações para artroplastia do quadril (176 do gênero feminino). A média da idade dos pacientes foi 71 anos (variação 31 a 99 anos). Os eventos adversos ocorreram em 76 pacientes (14,9%); não foi encontrada correlação entre as variáveis avaliadas e o número de complicações. CONCLUSÃO: Os dados não demonstraram fatores individuais que favorecessem complicações de pacientes submetidos à artroplastia do quadril e joelho; portanto, os cirurgiões têm que considerar administrações profiláticas para evitar complicações.

Complicações das endopróteses em pacientes com tumores ósseos do joelho / Endoprostheses-related complications in patients with bone tumors of the knee

As endopróteses não convencionais (ENC) são frequentemente utilizadas na ortopedia oncológica. As complicações do procedimento é motivo de pesquisa, pois há a instituição deste em população jovem e com grande potencial de sobrevida. Nós conduzimos uma revisão da literatura com o objetivo de buscar a melhor evidência científica relativa ao tema. A pesquisa englobou as bases: MEDLINE, EMBASE, CINAHL e o Registro Central Cochrane de ensaios clínicos randomizados (ECR), objetivando identificar estudos reportando complicações, e a substituição ou não da superfície articular da patela. Os estudos foram selecionados de acordo com a melhor qualidade metodológica existente para o assunto. Cento e quarenta e seis (146) estudos foram avaliados. Nenhum ERC foi encontrado. Realizamos uma avaliação qualitativa e quantitativa dos trabalhos encontrados (níveis de evidência IV e V). Utilizou-se o teste de U de Mann-Whitney para a análise estatística. Os resultados apontam para a necessidade de produção de novos estudos, para que se possa chegar a uma conclusão mais sólida. Pode-se considerar altas as taxas de complicações pós ENC, a despeito da baixa qualidade dos estudos, conforme demonstra os estudos existentes na literatura.

Non-conventional endoprostheses (NCE) are frequently used in orthopedic oncology. The complications associated with this procedure have prompted research, due to the fact that it is commonly performed on young patients, with a higher survival rate. We conducted a systematic review of the literature, searching for the best scientific evidence on the subject. The research was carried out in the following databases: MEDLINE, EMBASE, CINAHL and the Cochrane Central Register of randomized controlled trials (CCTR), seeking to identify studies that report complications, and compare patellar resurfacing versus retention. The studies were selected according to the best methodological quality that exists for the subject. One hundred and forty six (146) studies were evaluated. No randomized clinical trial was found. We conducted a qualitative and quantitative evaluation of the work found (evidence levels IV and V). We used the Mann-Whitney U test for the statistical analysis. The results indicate a need for further studies that will enable us to reach a more solid conclusion. The rate of complications after NCE can be considered high, despite the low quality of the studies, as demonstrated by the studies that exist in the literature.

Tumores ósseos e sarcomas dos tecidos moles / Bone tumor and soft tissue sarcomas

Quando avaliamos um paciente portador de doença reumática, temosque destacar entre os diagnósticos diferenciais os tumores ósseosprimários, secundários e os sarcomas dos tecidos moles. Assimcomo as doenças reumatológicas, os tumores que acometem ostecidos músculos esqueléticos têm uma predileção por indivíduosnas faixas etárias mais avançadas. Seu conhecimento é importantepara o correto diagnóstico e tratamento.

Ensaio clínico randomizado, duplo-cego, comparativo entre a associação de cafeína, carisoprodol, diclofenaco sódico e paracetamol e a ciclobenzaprina, para avaliação da eficácia e segurança no tratamento de pacientes com lombalgia e lombociatalgia agudas / A randomized, double-blind clinical trial, comparing the combination of caffeine, carisoprodol, sodium diclofenac and paracetamol versus cyclobenzaprine, to evaluate efficacy and safety in the treatment of patients with acute low back pain and lumboischialgia

OBJETIVO: Testar eficácia e segurança da associação de diclofenaco, paracetamol, carisoprodol e cafeína, no tratamento da lombalgia e lombociatalgia agudas, comparadas à eficácia e segurança da ciclobenzaprina. DESENHO DO ESTUDO: Ensaio clínico unicêntrico, randomizado, duplo-cego, comparativo. MÉTODO: As medicações foram administradas 3 vezes ao dia por um período de 7 dias. GRUPO ESTUDADO: 108 pacientes com diagnóstico de lombalgia e lombociatalgia agudas nos últimos 7 dias foram randomizados, sendo 54 em cada grupo. DESFECHO: Os critérios de eficácia primários selecionados para o estudo foram escala visual analógica para dor e questionário de Roland Morris, cujos resultados de antes e depois do tratamento foram comparados. Os secundários foram avaliação global do tratamento pelo paciente e pelo investigador e uso da medicação analgésica de resgate. Os critérios de segurança foram análise de tolerabilidade, interrupção da medicação por evento adverso e exames laboratoriais. RESULTADO: Não houve diferença estatística entre os grupos, em relação à eficácia, em nenhum dos desfechos analisados. Ambas as medicações mostraram-se seguras e toleráveis no tratamento da lombalgia e da lombociatalgia agudas. A análise estatística rigorosa mostrou diferença nos dois grupos apenas no que se refere aos eventos adversos, sendo mais freqüentes no grupo que foi tratado com a ciclobenzaprina.

Estadiamento de Enneking dos tumores músculo-esqueléticos / Enneking staging of musculoskeletal tumors

O autor apresenta a traduçäo e adaptaçäo para a língua portuguesa do estadiamento dos tumores do sistema músculo-esquelético proposto pelo Prof. Willian Enneking e utilizado mundialmente. O autor faz um resumo dos principais tópicos do estadiamento, explicando o texto através de esquemas adaptados das conferências do Prof. Enneking

Novos conceitos em biópsia óssea / New concepts in bone biopsy

Discutem-se novos conceitos em biópsia óssea. Propöe-se a utilizaçäo do método fechado através de agulhas de diferentes calibres e formas, em pacientes ambulatoriais e sob controle radiológico. O método mostrou-se seguro, preciso, econômico e relativamente indolor, fornecendo amostras de tecido suficientes para o diagnóstico histológico, citológico e bacterioscópico. O método näo impediu a realizaçäo posterior de biópsias abertas e contribuiu para aumentar as indicaçöes de cirurgias conservadoras, que evitam a amputaçäo dos membros

Estudo das técnicas de biópsia percutânea do esqueleto / Study of the techniques for percutaneous bone biopsies

Säo descritas as técnicas utilizadas para a biopsia percutânea do esqueleto em cada um dos segmentos, com ênfase especial à biopsia da coluna com a utilizaçäo de agulhas de vários calibres e formas, em pacientes ambulatoriais

A importância do estadiamento do planejamento cirúrgico dos tumores músculo-esqueléticos / The importance of staging for surgical plaming musculos ketal, tumors

O autor propöe uma classificaçäo e estadiamento baseados na classificaçäo internacional, para o estadiamento dos tumores do sistema músculo-esquelético. Com base em critérios clínicos, radiológicos e histológicos (G); localizaçäo (T) e presença ou ausência de metástases (M), descreve os estágios progressivos, o que auxilia na definiçäo do melhor tratamento cirúrgico e no prognóstico. O sistema é viável em nosso meio e serve como guia útil na seleçäo do melhor tratamento cirúrgico. Sua utilizaçäo permite estudos comparativos dos resultados no que diz respeito aos métodos cirúrgicos e näo-cirúrgicos de tratamento

Biópsia percutânea nas lesöes neoplásicas do esqueleto / Pecutaneous biopsy in neoplastic skeletal lesions

O autor discute novos conceitos a respeito das biópsias ósseas. Propöe a utilizaçäo das biópsias percutâneas nas lesöes neoplásicas primárias ou secundárias do esqueleto. Apresenta a técnica do método fechado através de agulhas de diferentes calibres e formas, em 209 pacientes, em regime ambulatorial e sob controle radiográfico. O método mostrou-se seguro, econômico e relativamente indolor, fornecendo amostras de tecido suficientes para o diagnóstico histológicos, citológico e bacterioscópico, com uma precisäo de 85%. O método näo impede a realizaçäo posterior de biópsias abertas e contribui sobremaneira para aumentar as indicaçöes de cirurgias conservadoras que evitam a amputaçäo

Hemipelvectomia: resultados obtidos em dezesseis pacientes operados no hospital do câncer de Pernambuco / Hemipelvectomy: results in 16 patients who underwent surgery at \"Hospital do Câncer de Pernambuco\" - Brazil

Os autores apresentam o resultado do tratamento de dezesseis pacientes portadores de neoplasias malígnas localizada na pelvi, submetidos a reumipelvectomia no Hospital do Câncer de Pernambuco. Em seis casos, 37,5porcemto, foram registrados: um óbito transoperário, três infecçSes de ferida, uma embolia pulmonar e uma recidiva local do tumor. O elevado índice de complicaçSes foi atribído ao estado avançado da doença, quamdo os pacientes procuraram o hospital