9210/0 Osteocartilaginous exostosis


Related terms

Osteochondroma

Definitions

Tumours of the central nervous system
ICD-O-3 topography code: C70, C71 and C72

A common, benign cartilaginous neoplasm arising from the metaphysis of bone. The tumor grows on the surface of the bone; it may be pedunculated or sessile. It is characterized by the presence of chondrocytes, a cartilage cap, and a fibrous perichondrium that extends to the periosteum of the bone. In some cases, there is a 8q24.1 deletion.



Nasal cavity and Sinuses
ICD-O-3 topography code: C30-C31

A common, benign cartilaginous neoplasm arising from the metaphysis of bone. The tumor grows on the surface of the bone; it may be pedunculated or sessile. It is characterized by the presence of chondrocytes, a cartilage cap, and a fibrous perichondrium that extends to the periosteum of the bone. In some cases, there is a 8q24.1 deletion.



Bone
ICD-O-3 topography code: C40-C41

Osteochondroma is a common, benign cartilaginous neoplasm arising from the metaphysis of bone. It is histologically characterized by the presence of chondrocytes, a cartilage cap, and a fibrous perichondrium that extends to the periosteum of the bone. Irregular calcification is common. A thick and irregular cartilage cap (greater than 2cm) may be indicative of malignant transformation.
Most cases are diagnosed in the first three decades of life without sex predilection. Approximately 15% of osteochondroma patients have multiple lesions which are often asymptomatic. Surgical removal is usually curative. Recurrence in a well excised lesion may indicate malignancy 1
 
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



.