1 Know what a set and an element are. 2  Write a mathematical statement with an equal sign or an inequality.  Identify what numbers belong to the set of natural numbers, whole numbers, integers, rational numbers, irrational numbers, and real numbers.
Discogenic spondylosis, which is often thought of as a form of spinal osteoarthritis, refers to a degenerative condition that affects the joints of the spine.
The relative rarity of the condition makes it a diagnosis that is not often considered. Further, the presentation of thoracic discogenic pain syndrome is variable and may resemble that of cervical or lumbar discogenic pain, which is much more common.