Osteochondroma is a benign cartilage forming lesion that is actually a disorder of growth and development, most commonly occurring around the knee. It exists in two forms: solitary sporadic exostosis, which occurs alone, or multiple hereditary exostosis, which is an inherited condition causing multiple growths.

1. Osteochondroma
Osteocartilagenous Exostoses

2.  MC benign cartilage forming lesion
 It is actually a disorder of growth and
development
 Around the knee
1. Solitary sporadic exostosis
2. Multiple Heriditary exostosis