secondary hypofunction
Quick Summary
Secondary endocrine hypofunction occurs when an endocrine gland is healthy but inactive due to a lack of stimulation or direct inhibition. This condition is reversible; the gland resumes normal function once the stimulating hormone is provided or the inhibiting factor is removed.1
A common cause is the destruction of the pituitary gland, which leads to the loss of stimulating (tropic) hormones. This results in a sequential decline in hormone production, starting with growth hormone, followed by gonadotropins, and then thyrotropin and adrenocorticotropin. Consequently, individuals may experience growth failure and hypofunction of the gonads, thyroid, and adrenal glands.1
Other causes of endocrine hypofunction include nutritional deficiencies like iodine deficiency, which is crucial for thyroid hormone production, and certain medications, such as lithium, which can inhibit thyroid hormone synthesis. Additionally, an overproduction of one hormone, like prolactin, can suppress the function of other endocrine glands, leading to secondary hypofunction. Hormone deficiency can also arise from defective hormonal action on target organs, where the body is unable to respond to the hormone effectively.2
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