Case 3. Hashimoto’s thyroiditis :
Type IV Autoimmune disease
The cause of Hashimoto’s thyroiditis is unknown. There are familial linkages (as seen in this patient). Other conditions that may predispose to Hashimoto’s are physical stress, radiation, viral infection, increased iodine, medications (most notably amiodarone, lithium, and interferon-α), other autoimmune diseases (most notably sjogren syndrome), female gender andm pregnancy.