Malignant rhabdoid tumor of the orbit.

@article{Rootman1989MalignantRT,
  title={Malignant rhabdoid tumor of the orbit.},
  author={Jack Rootman and Karim F. Damji and James E Dimmick},
  journal={Ophthalmology},
  year={1989},
  volume={96 11},
  pages={1650-4}
}
Malignant rhabdoid tumor (MRT), originally described as a sarcomatous variant of Wilms' tumor, is now recognized as a distinct, highly malignant entity. The authors describe, for the first time, a primary tumor of the orbit with histologic, immunohistochemical, and ultrastructural features of MRT. Their findings suggest both epithelial and mesenchymal differentiation of this unique tumor.