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OBJETIVOS: Descrever as características clínico-laboratoriais das crianças e adolescentes com osteossarcoma acompanhadas no Serviço de Oncologia Pediátrica da Santa Casa de Misericórdia de São Paulo e determinar as taxas de sobrevida livre de evento e sobrevida global, correlacionando-as com os principais fatores prognósticos. MÉTODOS: Estudo retrospectivo realizado no Serviço de Oncologia Pediátrica da Santa Casa de Misericórdia de São Paulo compreendendo o período entre abril de 1991 e setembro de 2002. Nesse período foram diagnosticados 60 casos de osteossarcoma. Observaram-se predomínio do sexo masculino (61,7%), raça não-branca (65%) e idade superior a 10 anos (70%); história de trauma prévio em 53,3%, relato de dor em 95% e aumento de volume em 80% dos casos. O joelho foi a região mais comprometida (74,9%). Em 70,7% dos casos o tumor apresentava tamanho inferior a 1/3 do comprimento do osso afetado, em 25% o nível sérico de desidrogenase láctica era igual ou maior que 500U/L e em 48,3% o nível de fosfatase alcalina era igual ou maior que 1.000U/L, 25% dos pacientes apresentavam metástase pulmonar visível ao diagnóstico e 53,3% pertenciam ao subtipo osteoblástico. O tratamento quimioterápico pré e pós-operatório foi realizado em 78,3% dos pacientes, 64% foram submetidos a procedimento cirúrgico conservador, 68,1% apresentaram necrose tumoral graus I e II e houve recidiva em 60% dos casos. RESULTADOS: Com seguimento de 48 meses observaram-se sobrevida livre de doença em 28,6% dos pacientes e sobrevida global de 38,4%. CONCLUSÕES: Os autores concluem que o diagnóstico precoce é fundamental, assim como novos estudos são necessários para aprimorar o manuseio e o tratamento desses pacientes e melhorar a sobrevida. OBJECTIVES: To describe clinical and laboratorial features of children and adolescents with osteosarcoma seen at the Pediatric Oncology clinic of the Santa Casa de Misericórdia Hospital in São Paulo and to determine the uneventful rates of survival and the overall survival, and correlate such rates to the main factors of prognosis. METHODS: Retrospective study carried out at the Pediatric Oncology clinic of the Santa Casa de Misericórdia Hospital in São Paulo from April 1991 to September 2002. 60 cases of osteosarcoma were identified in the period. The authors saw a predominance of the male sex (61.7%), non-white race (65%), and age above 10 years (70%); history of previous trauma in 53.3%, reporting pain in 95%, and volume increase in 80% of the cases. The knee joint was the involved region in most cases (74.9%). In 70.7% of the cases, the tumor was smaller than 1/3 of the bone affected, in 25% the serum lactic dehydrogenase level was equal to or greater than 500U/L, and in 48.3%, the alkaline phosphatase level was equal to or greater than 1000U/L, 25% of the patients presented with lung metastasis that was visible in the diagnosis, and 53.3% were of the osteoblastic subtype. Pre and post surgical chemotherapy was conducted in 78.3% of the patients, 64% were submitted to conservative surgery, 68.1% had tumoral necrosis grades I and II, and recurrence was seen in 60% of the cases. RESULTS: With a 48 month follow-up, they observed disease-free survival in 28.6% of the patients, and overall survival in 38.4%. CONCLUSIONS: They concluded that early diagnosis is a must, and that new studies are required to improve the management and treatment of this patients and to improve survival

Osteossarcoma: experiência do Serviço de Oncologia Pediátrica da Santa Casa de Misericórdia de São Paulo