The bone marrow lesion in osteoarthritis.

Area of Science:

• Orthopedics and Musculoskeletal Research
• Medical Imaging and Diagnostics
• Rheumatology and Arthritis Studies

Background:

• Osteoarthritis (OA) is a complex, multifactorial joint disease.
• Cartilage destruction is a hallmark of OA, but other structural abnormalities also contribute.
• Bone marrow lesions (BMLs) are increasingly recognized as significant contributors to OA pathology.

Purpose of the Study:

• To analyze the pathophysiology and natural history of OA-associated BMLs.
• To investigate the relevance of BMLs to radiographic OA progression and disease severity.
• To discuss the potential of BMLs as early indicators, risk factors, diagnostic tools, and therapeutic targets in OA.

Main Methods:

• Review and analysis of existing literature on OA and BMLs.
• Examination of the relationship between BMLs and joint structural changes.
• Correlation of BMLs with OA clinical manifestations, particularly pain.

Main Results:

• BMLs are closely associated with the severity of joint structural alterations in OA.
• BMLs correlate with pain, a primary clinical manifestation of OA.
• BMLs can impact subchondral bone, including its neural and vascular components, affecting adjacent tissues.

Conclusions:

• BMLs may precede other articular abnormalities and act as a risk factor for OA development.
• BMLs hold potential as an additional diagnostic tool for OA.
• BMLs represent a promising therapeutic target for managing OA.