Hypo og hyper? Litt nødhjelp, takk?!

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Jeg trenger fortsatt å forstå noe: Hva er årsaken til at man vipper mellom hyper og hypo?

• Switching Between Hypothyroidism And Hyperthyroidism. How TSH Receptor Antibodies Determine Thyroid Status
• Thyrotropin-blocking autoantibodies and thyroid-stimulating autoantibodies: potential mechanisms involved in the pendulum swinging from hypothyroidism to hyperthyroidism or vice versa.
• The Link between Graves’ Disease and Hashimoto’s Thyroiditis: A Role for Regulatory T Cells
• Can You Be Both Hypothyroid and Hyperthyroid?