Alkaline calcium phosphate crystal deposit disease

Alkaline calcium phosphate crystal deposition disease is a group of diseases including hydroxyapatite (apatite), octacalcium phosphate, tricalcium phosphate and other crystals deposited on and around joints, often complicated by osteoarthritis and destructive joint disease. The most common calcifications are deposited on the scapular spinal ligament and are called calcifying tendinitis; these substances can also be deposited next to the joints, especially the tendons, causing repeated episodes of inflammation, so it is also called paratendular calcification, Apatite rheumatism, calcified para-articular inflammation, etc. This clinical syndrome is currently summarized as alkaline calcium phosphate crystal deposition disease.