TSHR (Thyroid-Stimulating Hormone Receptor): TSHR is a parameter that indicates the activity of the thyroid-stimulating hormone receptor, which is encoded by the TSHR gene. This receptor, found on the surface of thyroid cells, is crucial in controlling the production and release of thyroid hormones in response to signals from the pituitary gland. Malfunction of TSHR can lead to thyroid-related disorders.