66 results
Approach to Thyroid Function Tests in the Evaluation of Hyperthyroidism
 • Low TSH, Low normal T4
• Low TSH, Low ... • Low TSH, normal ... • Low TSH, high ... T4 +/- T3 → Primary ... #algorithm #diagnosis
Laboratory Evaluation of Patients for Thyroid Disease 
Hyperthyroidism:
 • Graves disease - TSH low; free T4
Graves disease - TSH ... high; in some cases ... Toxic adenoma - TSH ... thyroiditis - TSH ... - TSH high; free
Hyperthyroidism Overview

Clinical Manifestation of Hyperthyroidism:
 • Fatigue
 • Weight loss
 • Heat intolerance
 • Depression, nervousness
• Insomnia Primary ... stimulators • TSH-producing ... Diagnosis: • ↓ Low TSH ... or Thyrotropin (TSH ... • Labs: - ↓ TSH
Hyperthyroidism - Differential Diagnosis Algorithm
High/Normal Radioiodine Uptake
 - Autoimmune Thyroid Disease:
    • Grave's
Hyperthyroidism ... Positive anti-TSH ... Multinodular Goiter - TSH ... Excess: • TSH-Secreting ... endocrinology #causes
Abnormal Serum TSH - Differential Diagnosis Algorithm
Increased TSH
 • Hypothyroidism
 • Sub-clinical Hypothyroidism
 • Recovery from
Abnormal Serum TSH ... Increased TSH ... • Hypothyroidism ... Illness Decreased TSH ... Toxicosis #TSH
Algorithm for the diagnostic workup of hyperthyroidism. (T3 = triiodothyronine; T4 = thyroxine; TSH = thyroid-stimulating
Algorithm for the ... T4 = thyroxine; TSH ... = thyroid-stimulating ... #hyperthyroidism ... #algorithm #diagnosis
Diagnosis of Primary Amenorrhea
A diagnostic approach to primary amenorrhea. (FSH = follicle-stimulating hormone; LH = luteinizing
Diagnosis of Primary ... (FSH = follicle-stimulating ... luteinizing hormone; TSH ... = thyroid-stimulating ... #Differential #Algorithm
Approach to the Diagnosis of Hyperthyroidism - Differential Diagnosis and Workup Algorithm

 • Secondary Hyperthyroidism (↑↔TSH,
(↑↔TSH, ↑Total ... (↓TSH, ↔Total ... (↓TSH, ↑Total ... unlikely (↔TSH, ... • Exogenous thyroid
Primary Hyperthyroidism - Pathogenesis and Clinical Findings

Note: Although rare, gestational diseases can lead to thyrotoxicosis due
Primary Hyperthyroidism ... structurally similar to TSH ... due to excess TSH ... - Bruit over thyroid ... Pretibial myxedema #Primary
Breast Discharge - Differential Diagnosis Algorithm
High Prolactin + Normal TSH
 • Microprolactinoma
 • Steroid Hormone Intake
Prolactin + Normal TSH ... + Normal/ Low TSH ... Prolactin + High TSH ... • Primary Hypothyroidism ... Endocrinology #Causes