Parosteal lipoma of the fibula.

@article{BuiMansfield2000ParostealLO,
  title={Parosteal lipoma of the fibula.},
  author={Liem T. Bui-Mansfield and C. Patrick Myers and Felix S K Chew},
  journal={AJR. American journal of roentgenology},
  year={2000},
  volume={174 6},
  pages={1698}
}