what if tsh is low but t3 and t4 are normal
Low or normal TSH, low free T3 or T4 Low or normal TSHand low free T3 or T4 test resultsrepresent a typical pattern in unwell patients with non-thyroidal illness, the most common combination of resultsbeing a low free T3 with a TSH in the normal range(panel 4).ge of onset varies from the neonatalperiod to adulthood, and a smooth or multinodular goitrecan develop. 20,21 Closely similar somatic mutations areresponsible for 80% of toxic nodules. Low TSH, normal free T3 or T4 Low TSH and normal free T3 and T4 test results areusually seen with thyroxine ingestion (panel 3).