CONCLUSIONS: The combination of elevated free T3 (fT3) and free T4 (fT4) levels with normal or elevated TSH should raise suspicion for RTHβ. The condition is usually asymptomatic and does not require treatment; however, misdiagnosis as hypo- or hyperthyroidism may lead to unnecessary interventions. Approximately 25-30% of patients present with ADHD and/or learning difficulties. Therefore, multidisciplinary evaluation including child psychiatry and early recognition of neurodevelopmental…
