Although less common than cervical or lumbar pain, thoracic pain is not an uncommon presentation in pain clinics. Thoracic pain may be nociceptive, neuropathic, mixed, or idiopathic. It can originate from bony structures, facet joints, intervertebral disks, or muscles and fascia. In addition, pain from the diaphragm, cervical spine, chest, and abdominal viscera may be referred to the thoracic region. Some of the conditions that should be kept in the differential include ankylosing spondylitis, Tietze syndrome, costochondritis, diffuse idiopathic skeletal hyperostosis, Scheuermann kyphosis, thoracolumbar junction syndrome, osteoarthritis, rheumatoid arthritis, vertebral compression fractures, facet arthropathy, and primary cancer and metastatic disease of the spine. This review focuses on thoracic pain of spinal and musculoskeletal origin. However, it is imperative not to overlook visceral pain because it may be associated with a life-threatening condition. Key words: ankylosing spondylitis, costochondritis, diffuse idiopathic skeletal hyperostosis, Maigne syndrome, sacroiliitis, Scheuermann kyphosis, slipping rib syndrome, thoracolumbar junction syndrome, Tietze syndrome
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