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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 ... #Hypothyroid #Function ... Comparison #Table #TSH
Laboratory Evaluation of Patients for Thyroid Disease 
Hyperthyroidism:
 • Graves disease - TSH low; free T4
of Patients for Thyroid ... iodine uptake; thyroid ... iodine uptake; thyroid ... disease course #hypothyroid ... #hyperthyroid #
Hyperthyroidism (low TSH, High T4/T3) - Diagnostic Algorithm

Radioactive iodine scan – get if concern for nodular
Hyperthyroidism (low TSH ... , High T4/T3) - ... concern for nodular thyroid ... Hyperthyroidism #Hyperthyroid
Subacute Thyroiditis

Also known as: de Quervain’s thyroiditis, granulomatous thyroiditis, or viral thyroiditis

What?
Postviral inflammatory process caused by
Thyrotoxic phase: ↑ T4 ... and T3 levels, ↓ TSH ... (2) Hypothyroid ... phase: ↓ T4 and ... ↓ TSH levels (
Abnormal Serum TSH - Differential Diagnosis Algorithm
Increased TSH
 • Hypothyroidism
 • Sub-clinical Hypothyroidism
 • Recovery from
Abnormal Serum TSH ... Recovery from Non-Thyroid ... Thyrotoxicosis • Non-Thyroid ... Diagnosis #Algorithm #Hypothyroid ... #Hyperthyroid #
Approach to Thyroid Function Tests in the Evaluation of Hyperthyroidism
 • Low TSH, Low normal T4
Approach to Thyroid ... , Low normal T4 ... T4 +/- T3 → Primary ... symmetrically enlarged thyroid ... , high T4 +/- T3
Thyroid Function Pathway 

Hypothyroidism is a very common condition! Here's a repost of the pathway that
Thyroid Function ... diagnosed with a HIGH TSH ... more and more TSH ... dose based on TSH ... /ambcarerx #Thyroid
Algorithm for the diagnostic workup of hyperthyroidism. (T3 = triiodothyronine; T4 = thyroxine; TSH = thyroid-stimulating
triiodothyronine; T4 ... = thyroxine; TSH ... = thyroid-stimulating
Approach to the Diagnosis of Hyperthyroidism - Differential Diagnosis and Workup Algorithm

 • Secondary Hyperthyroidism (↑↔TSH,
Hyperthyroidism (↑↔TSH ... ↑Total T3/Free T4 ... ↔Total T3/Free T4 ... ↑Total T3/Free T4 ... • Exogenous thyroid
Thyroid Function Tests (TFTs) and Interpretation

 • TSH, Free T4, Free T3
 • T3 Uptake
 •
Thyroid Function ... Interpretation • TSH ... , Free T4, Free ... @DharSaty #Thyroid