Tendinitis, also known as tendinopathy, is related to calcific tendinitis and tendinopathy, and has symptoms including back pain, muscle cramp and sciatica. An important gene associated with Tendinitis is CRP (C-Reactive Protein), and among its related pathways/superpathways are MIF Mediated Glucocorticoid Regulation and Akt Signaling. The drugs Sorbitol and Etanercept have been mentioned in the context of this disorder. Affiliated tissues include spinal cord and bone marrow, and related phenotypes are immune system and muscle