Management of thyroid disorders ... Endocrinology

Explore thyroid gland development from the floor of the pharynx to the isthmus, covering lingual thyroid remnants, follicles with thyroglobulin, T4/T3 synthesis, calcitonin from parafollicular cells, and thyroid hormone receptors.

Differentiate the causes of hypothyroidism, from Graves' disease and toxic multinodular goiter to thyroiditis and amiodarone-induced cases, using key clinical signs and biochemical findings.

Explore Graves disease, an autoimmune thyroid disorder with diffuse goiter and ophthalmopathy. Diagnose using TSH receptor antibodies and thyroid tests; treat with antithyroid drugs or radioiodine.

Explore autoimmune thyroid ophthalmopathy in Graves' disease, with inflammation of extraocular muscles and orbital tissue. Review MRI assessment and multidisciplinary management, including smoking cessation and steroids.

Explore hypothyroidism rooted in autoimmune thyroid disease, including Hashimoto's thyroiditis, with symptoms like fatigue, weight gain, dry skin, and goiter. Learn about antithyroid antibodies and levothyroxine treatment strategies.

Explore myxedema coma management in the icu, including iv thyroid hormone, rewarming, hydrocortisone, glucose support, and hyponatremia treatment, plus differentiation from thyroid hormone resistance and pituitary tumors.

Differentiate thyroid hormone resistance from pituitary TSH-secreting tumors using autosomal dominant inheritance, TRH response, alpha subunit levels, and MRI microadenoma; treat with transsphenoidal surgery.

Graves disease in pregnancy; differentiate from transient gestational hypothyroidism using anti-TSH receptor antibodies; manage with first-trimester antithyroid drug and monitor free thyroxine.

During severe acute illness, sick euthyroid syndrome lowers T3 and raises reverse T3 due to impaired T4 to T3 conversion. Avoid treatment in the ICU and reassess after recovery.

Assess subclinical hypothyroidism and amiodarone-induced hypothyroidism by repeating thyroid function tests after six weeks, guiding treatment with low-dose levothyroxine for persistent elderly cases at osteoporosis or heart-disease risk.