While the exact cause of<unk>  is not known, it is believed to occur either as an overgrowth of the cartilage that lines the ends of the bones, or as a persistent growth of original, embryonic cartilage.
Enchondroma
Myxoid cyst
Chondroma
Lipoblastoma
Chondrosarcoma
Neurofibroma
Klatskin tumor
Solitary fibrous tumor