1. A patient of sixty-eight suffering from enchondromatosis (Ollier's disease) is described.

2. A malignant tumour developed in the region of the lesser trochanter of the femur. Histological investigation established that it was an osteosarcoma.

3. Other features of interest are the radiographic appearance of Ollier's disease at an advanced age, and the presence of subcutaneous subcostal and retroperitoneal haemangiomata.