This case was a five-year-old girl with the disorder of numerous bones that is more severe on one side of her body.
Roentgenographically, the foci present more or less radiolucent areas interspersed by one or several septa running approximately in the long axes of the bones. Such striped radiolucent areas expanded in the epiphysial regions in severely affected bones as well. The focus at the distal metaphysis of right femur treated by curettage was occupied by glassy, gray-white, discrete or confluent cartilage masses separated by bony septa.
Microscopic findings showed the proliferation of the hyaline cartilage tumor cells with triangular nuclei.
