Serum Creatine Kinase Activity in Thyroid Disorders

Thyroid function and creatine kinase activity was measured in 50 patients of thyroid disorders. The decreased serum levels of triiodothyronine (T3), thyroxine (T4) and increased level of Thyroid stimulating hormone (TSH) in hypothyroid patients is well established but whether there is any correlation of creatine kinase (CK) with hypothyroidism is not well established. Therefore, a study of serum CK and thyroid profile was carried out. In hypothyroid patients with decrease in serum T3, there is a significant increase in CK and findings were reversed in hyperthyroid patients. Serum creatine kinase levels thus, show an inverse relation with serum T3 and T4 levels.