19 results
Laboratory Evaluation of Patients for Thyroid Disease 
Hyperthyroidism:
 • Graves disease - TSH low; free T4
; in some cases, ... high; T4 normal ... free T4 normal; ... disease course #hypothyroid ... #hyperthyroid #
Approach to Thyroid Function Tests in the Evaluation of Hyperthyroidism
 • Low TSH, Low normal T4
normal T4 → Possibly ... • Low TSH, normal ... T4 +/- T3 → Primary ... TSH, high T4 +/ ... #algorithm #diagnosis
Abnormal Serum TSH - Differential Diagnosis Algorithm
Increased TSH
 • Hypothyroidism
 • Sub-clinical Hypothyroidism
 • Recovery from
Abnormal Serum TSH ... Differential Diagnosis Algorithm ... • Hypothyroidism ... • Sub-clinical Hypothyroidism ... #Hypothyroid #Hyperthyroid
Pruritus - Generalized Differential Diagnosis Algorithm - Systemic and Primary Causes
== Primary Skin Lesions ==
Macules /
Pruritus - Generalized ... Systemic and Primary Causes ... failure/uremia TSH ... & T4: • Hypothyroidism ... #causes
Hyperthyroidism (low TSH, High T4/T3) - Diagnostic Algorithm

Radioactive iodine scan – get if concern for nodular
Hyperthyroidism ... (low TSH, High T4 ... ) - Diagnostic Algorithm ... #Hyperthyroidism ... #Hyperthyroid #
Hyperthyroidism Overview

Clinical Manifestation of Hyperthyroidism:
 • Fatigue
 • Weight loss
 • Heat intolerance
 • Depression, nervousness
goiter • Toxic diffuse ... stimulators • TSH-producing ... T3 • ↑ Free T4 ... Glucocorticoids: Reduce T4 ... #causes #diagnosis
Pruritus - No Primary Skin Lesion - Differential Diagnosis Algorithm

Blood Glucose:
 • Diabetes Mellitus
Liver Function Tests/Enzymes:
failure/uremia TSH ... & T4: • Hypothyroidism ... • Hyperthyroidism ... secondary #systemic #generalized ... #causes
Gynecomastia - Differential Diagnosis Algorithm
No Testicular Mass on Ultrasound
 • Adrenal Neoplasm
 • Increased Extraglomerular Aromatase
Tumor Increased T4 ... , Decreased TSH ... • Hyperthyroidism ... T4 and TSH • ... #causes #endocrinology
Hyperthyroidism - Differential Diagnosis Algorithm
High/Normal Radioiodine Uptake
 - Autoimmune Thyroid Disease:
    • Grave's
Hyperthyroidism ... Differential Diagnosis Algorithm ... High/Normal Radioiodine ... Struma Ovarii #Hyperthyroidism ... endocrinology #causes
Breast Discharge - Differential Diagnosis Algorithm
High Prolactin + Normal TSH
 • Microprolactinoma
 • Steroid Hormone Intake
Differential Diagnosis Algorithm ... High Prolactin + Normal ... • Primary Hypothyroidism ... Differential #Diagnosis #Algorithm ... Endocrinology #Causes