Chondroma (Subscribe)  

Clinical presentation: Incidental finding on a pre-op. chest in a middle aged male.
The heart and lungs appear grossly normal, except for a sharly demarcated amorphous calcific density that is projected over the right lung. The density cannot be localised in one view, but it is projected over the costo-chondral junction at...

History of progressive tender swelling of thumb in 81yr old caucasian female.
There is expansion of the metacarpal of the right thumb by a low density lesion with a well demarcated thick rim. The lesion contains some calcification. The appearance is complicated by a previous biopsy. The lesion is associated with...

* age: 10 - 50 yrs
* hands + wrists (50%) -- most common lesion of phalanges
* diaphyseal
* lytic, expansile
* thin sclerotic rim
* may be multilocular in...

Definition - Benign intramedullary cartilage tumour producing mature hyaline cartilage
Aetiology
Popular theory is
Arise from the physis as cell rests
Fail to undergo endochondral ossification and deposited into the metaphysis
Moves into diaphysis as it grows
Central location à Enchondroma
Outside the cortex à Periosteal or Juxtacortical Chondroma

Enchondromas are benign intramedullary cartilage lesions which occur primarily in long bones. They are usually asymptomatic, consisting of hyaline cartilage. Their etiology is unknown, however are believed to be the result of incomplete endochondral ossification. It is thought rests of physeal cartlilage become entrapped in the metaphysis...

Section of Orthopedics Hyperguide

Illustrated cases. See also on this site -
Enchondroma pseudotumor (Metaphyseal bone infarct)
Enchondroma, multiple enchondromatosis or Ollier's disease
Enchondroma, Ollier's or multiple enchondromatosis pseudotumor (Osseous tuberculosis)

Discussion: - benign and asymptomatic cartilaginous tumor of bone which most often occurs in adolescents or young adults; - it is an intramedullary cartilage lesion located in central metaphysis; - intramedullary tumor develops in adjacent metaphysis and may...

Enchondromas are benign cartilaginous neoplasms that originate in the medullary canal of tubular bones, believed to result from growth of residual benign cartilage rests displaced from the physis. They are often incidental findings, occurring in just under 2% of the population based on autopsy series. Approximately half of all enchondromas occur...

Illustrated cases. See also on this site -
Chondroma, periosteal
Chondroma, soft tissue

Cartilage tumors vary in severity from benign enchondroma to low-grade malignant chondrosarcoma to the highest-grade dedifferentiated chondrosarcoma. Chondrosarcoma is the second most common primary malignant bone tumor, accounting for 10-20% of all primary bony malignancies (Healey, 1986; Rizzo, 2001). Enchondroma, which consists of benign endosteal cartilage, is much more common...

Section of Orthopedics Hyperguide

Periosteal chondroma in the spine is rare and has not been reported in the sacrum until now. We report a case of periosteal chondroma that was unusual owing to its large size and location in the sacrum.
Ajay Pal Singh, MS(Ortho);*Arun Pal Singh, MS(Ortho);†Surbhi Mahajan, MD‡ Can J Surg, Vol....

Periosteal Chondroma: (Juxta Cortical Chondroma) Discussion: - cartilaginous tumor that arises from surface of cortex deep to the periosteum producing broad based cartilaginous mass that may extend into soft tissues; - often develops after...

This is a fairly common bone tumour. It present in the older patient unless there is a pathological fracture. The lesion is usually within a diaphysis. 50% occur in the hand, 10% in the feet, 20% in the long bones. It is often multiple. It has a well-defined endosteal margin,...