Chondropathy: Causes, Symptoms & Treatment

What is Chondropathy?

Chondropathy (from Greek chondros = cartilage and pathos = suffering) describes a group of diseases and injuries affecting articular cartilage. Cartilage tissue covers the joint surfaces of bones, enabling smooth, low-friction movement and absorbing compressive forces. When the cartilage is damaged or diseased, pain, swelling, and functional impairment develop in the affected joint. One of the most common forms is chondropathia patellae, in which the cartilage behind the kneecap is affected.

Causes

Chondropathy can be triggered by a variety of factors:

• Overuse and mechanical stress: Repetitive or one-sided joint loading, such as in competitive sports or physically demanding occupations, leads to progressive cartilage wear.
• Malalignment: Leg axis deformities (e.g., valgus or varus knees) or abnormal biomechanics increase pressure on specific cartilage zones.
• Trauma: Direct injuries such as falls, bruising, or twisting of the joint can cause acute cartilage damage.
• Age-related degeneration: As the body ages, cartilage loses its regenerative capacity, making it more susceptible to degenerative changes.
• Inflammatory conditions: Diseases such as rheumatoid arthritis or other autoimmune conditions can directly attack and destroy cartilage tissue.
• Excess body weight: Increased body weight amplifies mechanical joint loading and accelerates cartilage breakdown.

Severity Grading

Cartilage damage is typically classified using the Outerbridge Classification or the ICRS Grade (International Cartilage Repair Society):

• Grade I: Softening and swelling of cartilage, surface still intact.
• Grade II: Superficial fissures or cracks, less than 50% of cartilage thickness affected.
• Grade III: Deep fissures, more than 50% of cartilage thickness affected, without exposure of subchondral bone.
• Grade IV: Complete cartilage loss with exposure of the underlying bone.

Symptoms

The symptoms of chondropathy vary depending on the severity and the affected joint region. Typical symptoms include:

• Load-dependent joint pain, worsening with prolonged sitting, climbing stairs, or physical activity
• Swelling of the affected joint
• Clicking or grinding sensations in the joint (crepitation)
• Stiffness, particularly after periods of rest
• Muscle wasting (atrophy) of the muscles surrounding the joint in chronic cases
• In advanced stages: pain even at rest

Diagnosis

Diagnosing chondropathy relies on several examination methods:

• Clinical examination: Palpation of the joint, assessment of tenderness, range of motion, and stability.
• X-ray imaging: Reveals bony changes and joint space narrowing, but does not directly visualize cartilage.
• MRI (Magnetic Resonance Imaging): Gold standard for assessing cartilage damage; allows precise visualization of the extent and depth of the lesion.
• Arthroscopy: Joint inspection via minimally invasive surgery, providing direct assessment and simultaneous treatment of cartilage defects.

Treatment

Conservative Treatment

For mild to moderate cartilage damage, non-surgical measures are the first line of management:

• Physiotherapy: Targeted exercises to strengthen the muscles surrounding the joint and reduce load on the affected cartilage area.
• Pain management: Use of NSAIDs (non-steroidal anti-inflammatory drugs) such as ibuprofen or diclofenac to relieve pain and inflammation.
• Injection therapy: Intra-articular injections with corticosteroids or hyaluronic acid to improve joint function and reduce pain.
• Weight reduction: Reducing mechanical joint load by achieving a healthy body weight.
• Orthopedic aids: Insoles, braces, or orthoses to offload the joint.

Surgical Treatment

For advanced cartilage damage or insufficient response to conservative therapy, the following surgical options are available:

• Microfracture: An arthroscopic technique in which the bone beneath the damaged cartilage is perforated to stimulate fibrocartilage formation.
• Autologous Chondrocyte Implantation (ACI/MACI): Harvesting, culturing, and reimplanting the patient's own cartilage cells into the defect.
• Osteochondral transplantation (OATS): Transfer of cartilage-bone cylinders from less loaded joint areas into the defect site.
• Joint replacement: In cases of severe, widespread cartilage loss, a prosthetic joint (endoprosthesis) may be required.

Prevention

Targeted preventive measures can significantly reduce the risk of developing chondropathy. Recommendations include:

• Regular, joint-friendly physical activity (e.g., swimming, cycling)
• Adequate recovery after intense physical exertion
• Correct technique during sports and everyday movements
• Assessment and correction of lower extremity malalignment where necessary
• Maintaining a healthy body weight

References

1. Buckwalter J.A., Mankin H.J., Grodzinsky A.J. - Articular Cartilage and Osteoarthritis. In: Instructional Course Lectures, Vol. 54, American Academy of Orthopaedic Surgeons, 2005.
2. Brittberg M., Winalski C.S. - Evaluation of cartilage injuries and repair. Journal of Bone and Joint Surgery, 85-A (Suppl 2): 58-69, 2003.
3. Steinwachs M., Kreuz P.C. - Autologous chondrocyte implantation in chondral defects of the knee with a type I/III collagen membrane: a prospective study with a 3-year follow-up. Arthroscopy, 2007.