RESUMO
Los liposarcomas retroperitoneales son tumores infrecuentes. Sus peculiaridades biológicas y clínicas les confieren algunos aspectos diferenciales respecto al resto de los sarcomas retroperitoneales. Se presenta el caso de una paciente de 59 años con el diagnóstico de liposarcoma retroperitoneal, variedad mixoide, con recidiva en cuatro oportunidades, realizándose en todas exéresis completa del tumor, sin extirpación de órganos vecinos, con radioterapia como tratamiento adyuvante. La supervivencia de esta paciente fue de cuatro años. La elevada tendencia a la recidiva de estos tumores determina un pronóstico global malo.
Retroperitoneal liposarcomas are infrequent tumors. Their biological and clinical peculiarities confer them some differential aspects regarding the rest of retroperitoneal sarcomas. The case of a 59 year-old patient is presented with the diagnosis of retroperitoneal liposarcoma, myxoid variety, with recidivation in four opportunities, being carried out in all complete exeresis of the tumor, without extirpation of neighbor organs, with radiotherapy as adjuvant treatment. This patient's survival was of four years. The high tendency to recidivation of these tumors determines a bad global prognosis.
Assuntos
Humanos , Feminino , Lipossarcoma Mixoide/terapia , Neoplasias Retroperitoneais/terapiaRESUMO
A case of a male patient, 66 years old, who exhibited in a period of six years many multicentric and multifocal synchronic and metachronic myxoid liposarcomas is reported. The authors made a revision of cytogenetics and DNA alterations recently identified in this type of tumor. The chromosomic alterations are represented by the translocation t(12;16) (q13;p11) and trisomy of the chromosome 8. The genic analysis revealed the presence of altered restriction fragments due to highly specific and reproducible methylation differences. In conclusion the authors suggest that the presence of the multiple tumors of this type in the same patient could be due to a common etiologic factor, not yet known, as being the initiator of this systemic illness of the fat tissue.