Enchondroma versus Chondrosarcoma in Long Bones of Appendicular Skeleton: Clinical and Radiological Criteria—A Follow-Up

Table 1

Compared features of solitary enchondroma and low grade chondrosarcoma.

Features	Solitary enchondroma	Low grade chondrosarcoma
Clinical	(i) Younger patients; (ii) Pain is rare; (iii) Typical in appendicular skeleton; (iv) In general <5 cm	(i) Patients > 25 years; (ii) Inflammatory pain; (iii) Axial skeleton; (iv) Bigger size
Radiological	(i) Intramedullary; (ii) No periosteal reaction; (iii) No endosteal scalloping; (iv) No changes over time; (v) No soft tissue mass	(i) Intramedullary; (ii) Periostealreaction and microfractures; (iii) Endosteal scalloping; (iv) Loss of calcification. Increasing size; (v) Soft tissue mass in some cases
Pathology	(i) Encasement pattern; (ii) No endosteal scalloping; (iii) Multinodular; (iv) Surrounded by lamellar bone; (v) No bone marrow infiltration	(i) Haversian system invasion; (ii) Periosteal reaction and endosteal scalloping; (iii) Single mass; (iv) Occasional sites of necrosis and haemorrhage; (v) Bone marrow invasion