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Immunoreactive endothelin in nodular pathology of the thyroid

Endothelins (ETs) can act as autocrine and/or paracrine regulators of thyroid homeostasis and growth. The aim of this study was to evaluate immunoreactive ET (i‐ET) levels in a group of patients with nodular pathology of the thyroid and to correlate them with the cytomorphological features after fine‐needle aspiration (FNA) and with hormonal and immunological status and blood pressure levels.