Sequential Ewing's sarcoma and osteosarcoma.

@article{Sharma2008SequentialES,
  title={Sequential Ewing's sarcoma and osteosarcoma.},
  author={Vivek Mohan Sharma and Alvin H. Crawford and Jonathan S. Evans and Margaret H. Collins},
  journal={Journal of pediatric orthopedics. Part B},
  year={2008},
  volume={17 6},
  pages={333-7}
}
The sequential occurrence of two primary bone tumors, Ewing's sarcoma and osteosarcoma in the same patient at two different anatomical sites 5 years apart is rare. We report a case of 12-year-old boy who after treatment for Ewing's sarcoma of proximal fibula subsequently presented, 4 years later, with a high-grade fibroblastic osteosarcoma of the proximal humerus. The patient was also found to have a rare gene tranlocation t (7;22) instead of the more common t (11;22).