Extraskeletal chondromas.

1. Extraskeletal chondromas occur in three variants: (a) as multiple nodules of synovial chondromatosis within a joint, (b) as a solitary lesion in association with articulations, within or adjacent to them, and (c) as an isolated cartilagenous lesion in the soft tissues, mostly of the hands and feet. 2.

Bone tumors of mixed origin: osteo-liposarcoma and osteo-rhabdomyosarcoma.

1. A complete perusal of the literature revealed twenty cases of primary liposarcoma of bone acceptable as such to the authors. These were tabulated as to location and age.

Desmoplastic fibroma of bone: report of one case and review of the literature.

A case of a primary desmoplastic fibroma of bone has been presented with a complete review of the world's literature on the subject. Our case represents the one hundred and twenty seventh case (127th) reported. The usual aggressive local growth and the classical radiological and histological characteristics are very well depicted in the case.