Osteochondrosis dessicans (OCD) is a condition of abnormal cartilage growth seen in rapidly growing dogs. (homevet.com)
The Kennel Club of the UK says,» Most cases develop as a result of abnormal rubbing within the joint caused by joint instability (e.g. after ligament damage), damage to or abnormal cartilage development, or damage caused by trauma (e.g. fractures).» (fidoseofreality.com)
This failure leads to abnormal cartilage thickening (Figure 2). (acvs.org)