Thyroid Stimulating Immunoglobulin Actual to Control Ratio Measurement

**Semantic type:** Laboratory Procedure

**Definition:** The determination of the ratio of the thyroid stimulating immunoglobulin in a subject's specimen compared to a control sample. The measurement may be expressed as a ratio or percentage.

**Synonyms:** - TSI Actual/Control - TSI Actual/Control - TSIAC - Thyroid Stimulating Immunoglobulin Actual/Control - Thyroid Stimulating Immunoglobulin Actual/Normal