RESUMO
Chondromyxoid fibroma-like osteosarcoma (CMF-OS) is a low-grade osteosarcoma, often misdiagnosed on initial biopsy as a benign lesion, with five cases previously described. We report a 13-year-old male with an intramedullary lytic CMF-OS of the right tibial proximal metaphysis with cortical destruction and soft tissue extension. Diagnosis was based on malignant new bone formation, increased mitotic figures, lamellar bone permeation with bony destruction, and correlation with imaging studies. There were no metastasis at presentation and the tumor showed good response to standard chemotherapy with >95% necrosis.
Assuntos
Neoplasias Ósseas/patologia , Fibroma/patologia , Osteossarcoma/patologia , Adolescente , Biópsia/métodos , Neoplasias Ósseas/diagnóstico , Diagnóstico Diferencial , Fibroma/diagnóstico , Humanos , Masculino , Gradação de Tumores/métodos , Metástase Neoplásica/patologia , Osteossarcoma/diagnósticoRESUMO
We present an adolescent with distal radius nonunion following an open fracture and failed surgery which eventually united when the length and stability was restored for eight weeks duration. The intact periosteal sleeve at the nonunion site formed new bone when its tension was restored by gradual differential distraction. This case report highlights the possibility of stimulating bony union in an established atrophic nonunion by distracting the minimally disturbed soft tissue and thick osteogenic periosteal envelope in the paediatric age group.
