Hemangioma of the synovial membrane.

@article{Lewis1959HemangiomaOT,
  title={Hemangioma of the synovial membrane.},
  author={Richard C. Lewis and M. B. Coventry and E. H. Soule},
  journal={The Journal of bone and joint surgery. American volume},
  year={1959},
  volume={41-A 2},
  pages={
          264-71
        }
}