A potential bursal space at the thoracolumbar junction (T12-L1) between the overlying posterior thoracolumbar fascia and the underlying paraspinal muscles, developing in response to the increased mechanical loading at this transitional zone between the rigid thoracic spine and the mobile lumbar spine.
Thoracolumbar junction bursitis contributes to the T12-L1 level pain that is often misattributed to facet or disc pathology. It is part of the thoracolumbar pain syndrome, which may also involve the superior cluneal nerve entrapment at the iliac crest. The junction is a common site of thoracolumbar fascia pathology, and bursal inflammation here responds to deep transverse friction massage and targeted injection.
Pain at the T12-L1 transition zone from bursal inflammation and thoracolumbar fascia dysfunction, producing low back and upper buttock pain aggravated by twisting activities, managed with injection and fascial release.
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