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WHO Classification of Tumours
Chondroma, NOS


A benign, well-circumscribed neoplasm arising from the hyaline cartilage in soft tissue or bone, histologically characterized by the presence of chondrocytes. Three types of chondroma have been characterized which share many histological features but differ with respect to location and clinical features
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Fletcher CDM, Unni KK, Mertens F (Eds.)
World Health Organization Classification of Tumours. Pathology and Genetics of Tumours of Soft Tissue and Bone.
3rd Edition
IARC Press: Lyon 2002

Enchondroma is a benign, usually solitary hyaline cartilage neoplasm of medullary bone.
Periosteal (juxtacortical) chondroma is a benign hyaline cartilage neoplasm of bone surface that arises from the periosteum.
Enchondromatosis is part of Ollier disease , a non-inherited developmental disorder caused by failure of normal enchondral ossification and characterized by asymmetric cartilaginous masses (enchondromas) in the metaphysis and adjacent regions of the shafts and flat bones, with varying degrees of bone deformity. Maffucci syndrome combines the features of Ollier disease associated with angioma of the soft tissue.