29 results
Laboratory Evaluation of Patients for Thyroid Disease 
Hyperthyroidism:
 • Graves disease - TSH low; free T4
Thyroid Disease Hyperthyroidism ... high; in some cases ... iodine uptake Hypothyroidism ... disease course #hypothyroid ... #hyperthyroid #
Approach to Thyroid Function Tests in the Evaluation of Hyperthyroidism
 • Low TSH, Low normal T4
T4 → Possibly Central ... T4 +/- T3 → Subclinical ... Low TSH, high T4 ... 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 ... Increased TSH • Hypothyroidism ... • Sub-clinical Hypothyroidism ... #Hypothyroid #Hyperthyroid
Pruritus - Generalized Differential Diagnosis Algorithm - Systemic and Primary Causes
== Primary Skin Lesions ==
Macules /
Pruritus - Generalized ... Differential Diagnosis Algorithm ... Systemic and Primary Causes ... /uremia TSH & T4 ... #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 #
Pruritus - No Primary Skin Lesion - Differential Diagnosis Algorithm

Blood Glucose:
 • Diabetes Mellitus
Liver Function Tests/Enzymes:
/uremia TSH & T4 ... : • Hypothyroidism ... • Hyperthyroidism ... secondary #systemic #generalized ... #causes
Causes of Generalized Edema - Differential Diagnosis Algorithm
Overfill (Increased renal sodium retention, Urine Na > 40meq/L)
Causes of Generalized ... Differential Diagnosis Algorithm ... • Myxedema (Hypothyroid ... Edema #anasarca #Generalized ... #Causes
Abnormal Lipid Profiles - Differential Diagnosis Algorithm

Increased Cholesterol and Triglycerides 
 - Genetic Causes
Abnormal Lipid Profiles ... Differential Diagnosis Algorithm ... Diabetes • Hypothyroidism ... • Hypothyroid ... #Dyslipidemia #Abnormal
Gynecomastia - Differential Diagnosis Algorithm
No Testicular Mass on Ultrasound
 • Adrenal Neoplasm
 • Increased Extraglomerular Aromatase
Differential Diagnosis Algorithm ... Tumor Increased T4 ... Decreased TSH • Hyperthyroidism ... T4 and TSH • ... #causes #endocrinology
Hypothyroid Myopathy
Very common (up to 80% ) in patients with hypothyroidism
Pathophysiology:
 • T4 deficiency leads to
Hypothyroid Myopathy ... patients with hypothyroidism ... Pathophysiology: • T4 ... deficiency leads to abnormal ... Rhabdomyolysis (rare) #Hypothyroid