👉 Henslow's disease, also known as pheochromocytoma, is a rare genetic disorder characterized by elevated levels of thyroxine (T4) in the blood. It affects the thyroid gland and can lead to severe hypothyroidism, which can affect various organs including the heart and brain. This condition is often caused by mutations in the enzyme TSH-receptor, leading to an overproduction of thyroid hormones such as T4. Henslow's disease has been