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Although the majority of patients with Hashimoto’s thyroiditis and their genetic family members will never experience any other autoimmune condition, they do have a statistically increased risk of developing the following disorders:
Type 1 diabetes mellitus (insulin-requiring) • Graves’ disease (goiter and hyperthyroidism or overactive thyroid) • Rheumatoid arthritis • Pernicious anemia (inability to absorb vitamin B12, potentially causing anemia and neurologic problems) • Addison’s disease (adrenal failure; the adrenal gland provides cortisol to handle stress and illness) • Premature ovarian failure (early menopause) • Vitiligo (patchy loss of skin pigmentation) • Thrombocytopenic purpura (bleeding disorder due to an inadequate number of platelets in the blood) • Lupus erythematosus (autoimmune disease that involves skin, heart, lungs, kidneys and joints)
It is not related to high platelet count but low platelet count.