Atlantoaxial Bursa

bursa articulationis atlantoaxialis

Bursae associated with the atlantoaxial joint capsules at C1-C2, facilitating the rotational movement that accounts for approximately 50% of cervical rotation. The median atlantoaxial joint may have a small bursa between the dens and the transverse ligament of the atlas.

Region: Neck

Clinical Relevance

Clinical Notes

Atlantoaxial bursitis is seen in rheumatoid arthritis, where pannus formation at C1-C2 produces synovial proliferation and bursitis threatening the transverse ligament and spinal cord. MRI demonstrates the synovial mass. Atlantoaxial instability from transverse ligament destruction requires surgical fusion. C1-C2 steroid injection addresses inflammatory bursitis in milder disease.

Pathology

Common Injuries & Conditions

Atlantoaxial Synovitis

Inflammatory bursal and synovial proliferation at C1-C2 in rheumatoid arthritis producing occipital pain and potentially life-threatening atlantoaxial instability requiring MRI monitoring and surgical fusion.