Sample: Frozen Serum
Schedule: Friday every two weeks
Range: < 1.0 Negative
1.0 - 1.5 Borderline
> 1.5 Increased
Remarks: Thyrotrophin Receptor Antibodies (TR-AB), also called TSI (Thyroid Stimulating Immunoglobulin) is a term used for all antibodies that recognise the receptor for Thyroid-Stimulating Hormone (TSH). These antibodies can be detected in about 90% of patients with hyperthyroidism due to Graves disease and play a major role in the pathogenesis of this disease.