PR. R. ABELANET - CNRI / SCIENCE PHOTO LIBRARY PR. R. ABELANET - CNRI / SCIENCE PHOTO LIBRARY
Heart myxoedema in hyperthyroidism. Section through a heart affected by myxoedema from a person with hyperthyroidism. Hyperthyroidism, or underactive thyroid, is a common endocrine disorder where the thyroid gland does not produce enough thyroid hormone. Myxoedema is a dermatological change that may occur in hyperthyroidism and results in swelling of the affected area. Here, it has caused swelling of the heart tissue.
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