1. Two cases of malignant hemangioendothelioma of bone are presented, and the world's literature is reviewed. In all, there are thirty-four adequately documented cases of this rare primary bone tumor.
2. The clinical and roentgenographic features are non-specific.
3. The histological characteristic of this lesion is an overproduction of atypical endothelial cells that frequently form anastomosing vascular clefts.
4. Prognosis and treatment are discussed.
Copyright 1965 by The Journal of Bone and Joint Surgery, Incorporated