Serum cystatin C is sensitive to small changes in thyroid function

Background: Serum cystatin C (CysC) is a novel marker for kidney function. The impact of mild thyroid dysfunction on CysC has never been investigated. Methods: CysC was determined at the time of diagnosis of subclinical hypo- and hyperthyroidism, and when TSH returned into the normal range in 40 consecutive patients with mild thyroid dysfunction. Results: Twenty-six patients with subclinical hypothyroidism and 14 patients with subclinical...