Thyrogen, generically known as thyrotropin alfa, is a synthetic form of thyroid-stimulating hormone (TSH) used in the field of medicine primarily to aid in the diagnosis of thyroid cancer and in the management of certain thyroid conditions. It is administered through injection and works by stimulating the thyroid gland to produce thyroid hormone. This is particularly useful in preparing patients for radioactive iodine treatment or in conducting whole body scans for thyroid cancer without the need to stop thyroid hormone therapy, which can lead to hypothyroidism and its associated symptoms. Thyrogen is utilized in a clinical setting under the guidance of healthcare professionals specialized in the treatment of thyroid disorders.