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Amplificação 12q define um subtipo de osteossarcoma extraesquelético com bom prognóstico, que é o homólogo de tecido mole de osteossarcoma parosteal

Postado em: 12/07/2012

12q amplification defines a subtype of extraskeletal osteosarcoma with good prognosis that is the soft tissue homologue of parosteal osteosarcoma

Autor(es): Kyriazoglou AI; Vieira J; Dimitriadis E; Arnogiannaki N; Teixeira MR; Pandis N
Fonte: Cancer Genet; 205(6): 332-6, 2012 Jun.
Artigo [MEDLINE PMID: 22749040 ] Idioma: Inglês
Tipo de publicação: Artigo de Revista

Extraskeletal osteosarcomas are rare tumors with neoplastic cells synthesizing bone, usually associated with poor prognosis. We present the case of a 40-year-old man with an extraskeletal osteosarcoma that was treated by surgery and adjuvant radiotherapy. Thirteen years after the diagnosis, he remains disease-free, without any recurrences or metastases. Histopathological analysis favored the diagnosis of chondroblastic extraskeletal osteosarcoma grade II. G-banding, comparative genomic hybridization (CGH), and real-time PCR for the MDM2 and CDK4 genes were performed to describe the genetic profile of this tumor and revealed aberrations that are common findings of parosteal osteosarcomas. Ring chromosomes, giant marker chromosomes, and a telomeric association were found with G-banding. CGH revealed that 12q was amplified in the ring and giant markers identified by G-banding. Real-time PCR for MDM2 and CDK4 confirmed the amplification of these genes located in 12q. Our findings suggest that a variant of extraskeletal osteosarcoma, which is genotypically similar to parosteal osteosarcoma, exists and is associated with good prognosis.
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