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Thyroid Function Test Interpretation Table

TSH, Free T4, Free T3 and Associated Condition
#Diagnosis #Endocrinology #Hyperthyroid #Hypothyroid #Function
Thyroid Function ... Interpretation Table TSH, Free ... T4, Free T3 and ... #Hypothyroid #Function ... #FreeT4 #Labs #
Thyroid Function Tests (TFTs) and Interpretation

 • TSH, Free T4, Free T3
 • T3 Uptake
 •
Thyroid Function ... Interpretation • TSH, Free ... T4, Free T3 • ... T3 Uptake • Free ... #Function #Tests
Laboratory Evaluation of Patients for Thyroid Disease 
Hyperthyroidism:
 • Graves disease - TSH low; free T4
disease - TSH low; free ... is elevated and free ... goiter - TSH low; free ... adenoma - TSH low; free ... #hyperthyroid #
Abnormal Serum TSH - Differential Diagnosis Algorithm
Increased TSH
 • Hypothyroidism
 • Sub-clinical Hypothyroidism
 • Recovery from
Differential Diagnosis Algorithm ... Recovery from Non-Thyroid ... Thyrotoxicosis • Non-Thyroid ... Thyrotoxicosis • T3 ... #Hypothyroid #Hyperthyroid
Approach to the Diagnosis of Hyperthyroidism - Differential Diagnosis and Workup Algorithm

 • Secondary Hyperthyroidism (↑↔TSH,
Diagnosis and Workup ... /Free T4) • Subclinical ... /Free T4) • Overt ... /Free T4) • ß-hCG-associated ... /Free T4) Radioactive
Hyperthyroidism (low TSH, High T4/T3) - Diagnostic Algorithm

Radioactive iodine scan – get if concern for nodular
low TSH, High T4/T3 ... ) - Diagnostic Algorithm ... concern for nodular thyroid ... Hyperthyroidism #Hyperthyroid ... #Diagnosis #Algorithm
Algorithm for the diagnostic workup of hyperthyroidism. (T3 = triiodothyronine; T4 = thyroxine; TSH = thyroid-stimulating
Algorithm for the ... diagnostic workup ... (T3 = triiodothyronine ... thyroxine; TSH = thyroid-stimulating ... #diagnosis #workup
Approach to Thyroid Function Tests in the Evaluation of Hyperthyroidism
 • Low TSH, Low normal T4
Approach to Thyroid ... Function Tests ... Hyperthyroidism: Work-up ... symmetrically enlarged thyroid ... Hyperthyroidism #algorithm
Hyperthyroidism Overview

Clinical Manifestation of Hyperthyroidism:
 • Fatigue
 • Weight loss
 • Heat intolerance
 • Depression, nervousness
thyrotoxicosis • T3 ... TSH • ↑ Total T3 ... • ↑ Free T4 ... ↑ FT4 and/or ↑ T3 ... : Reduce T4 -> T3
Evaluation of Secondary Hypertension
 • Primary aldosteronism - PRA, PAC
 • Renal artery stenosis - Renal
Hypothyroidism - TSH, T3 ... cortisol. 24-h urine free ... resistant #Evaluation #workup