109 results
Approach to Thyroid Function Tests in the Evaluation of Hyperthyroidism
 • Low TSH, Low normal T4
Approach to Thyroid ... • Low TSH, Low ... • Low TSH, normal ... symmetrically enlarged thyroid ... T3 → Central (secondary
A diagnostic approach to secondary amenorrhea. (DHEA-S = dehydroepiandrosterone sulfate; FSH = follicle-stimulating hormone; LH =
diagnostic approach to secondary ... dehydroepiandrosterone sulfate; FSH ... resonance imaging; TSH ... = thyroid-stimulating ... #PrimaryCare #Secondary
Laboratory Evaluation of Patients for Thyroid Disease 
Hyperthyroidism:
 • Graves disease - TSH low; free T4
of Patients for Thyroid ... Disease Hyperthyroidism ... iodine uptake Hypothyroidism ... positive • Ablative hypothyroidism ... • Infantile hypothyroidism
Hyperthyroidism Overview

Clinical Manifestation of Hyperthyroidism:
 • Fatigue
 • Weight loss
 • Heat intolerance
 • Depression, nervousness
Hyperthyroidism ... thyroiditis Secondary ... Diagnosis: • ↓ Low TSH ... or Thyrotropin (TSH ... • Labs: - ↓ TSH
Approach to the Diagnosis of Hyperthyroidism - Differential Diagnosis and Workup Algorithm

 • Secondary Hyperthyroidism (↑↔TSH,
Algorithm • Secondary ... (↑↔TSH, ↑Total ... (↓TSH, ↔Total ... (↓TSH, ↑Total ... • Exogenous thyroid
Evaluation of Secondary Hypertension
 • Primary aldosteronism - PRA, PAC
 • Renal artery stenosis - Renal
Evaluation of Secondary ... metanephrines • Hypothyroidism ... - TSH, T3, fT4 ... • Hyperthyroidism ... syndromes - PRA, PAC #Secondary
Primary Hyperthyroidism - Pathogenesis and Clinical Findings

Note: Although rare, gestational diseases can lead to thyrotoxicosis due
Primary Hyperthyroidism ... structurally similar to TSH ... Secondary hyperthyroidism ... due to excess TSH ... - Bruit over thyroid
Hyperthyroidism - Differential Diagnosis Algorithm
High/Normal Radioiodine Uptake
 - Autoimmune Thyroid Disease:
    • Grave's
Hyperthyroidism ... - Autoimmune Thyroid ... - Autonomous Thyroid ... • Excessive Thyroid ... Struma Ovarii #Hyperthyroidism
Algorithm for the diagnostic workup of hyperthyroidism. (T3 = triiodothyronine; T4 = thyroxine; TSH = thyroid-stimulating
diagnostic workup of hyperthyroidism ... T4 = thyroxine; TSH ... = thyroid-stimulating ... #hyperthyroidism
Abnormal Serum TSH - Differential Diagnosis Algorithm
Increased TSH
 • Hypothyroidism
 • Sub-clinical Hypothyroidism
 • Recovery from
Abnormal Serum TSH ... • Hypothyroidism ... • Sub-clinical Hypothyroidism ... Recovery from Non-Thyroid ... Thyrotoxicosis • Non-Thyroid