21 results
Approach to Thyroid Function Tests in the Evaluation of Hyperthyroidism
 • Low TSH, Low normal T4
normal T4 → Possibly ... • Low TSH, normal ... Can repeat labs ... #algorithm #diagnosis ... #endocrinology
Hyperthyroidism - Differential Diagnosis Algorithm
High/Normal Radioiodine Uptake
 - Autoimmune Thyroid Disease:
    • Grave's
Hyperthyroidism ... /Normal Radioiodine ... Trophoblastic Neoplasm Low ... #endocrinology ... #causes
Breast Discharge - Differential Diagnosis Algorithm
High Prolactin + Normal TSH
 • Microprolactinoma
 • Steroid Hormone Intake
Diagnosis Algorithm ... / Low TSH • Pituitary ... TSH • Primary Hypothyroidism ... #Endocrinology ... #Causes
Hirsutism & Virilization - Differential Diagnosis Algorithm
ADRENAL EXCESS
Ovarian
 • Polycystic Ovarian Syndrome
 • Hyperthecosis
 • Tumor
Adrenal
Syndrome Tumor Low ... Idiopathic Hirsutism - Normal ... Medical/Other • Hypothyroidism ... #endocrinology ... #causes
Laboratory Evaluation of Patients for Thyroid Disease 
Hyperthyroidism:
 • Graves disease - TSH low; free T4
Thyroid Disease Hyperthyroidism ... high; in some cases ... iodine uptake Hypothyroidism ... #hyperthyroid #differential ... #diagnosis #endocrinology
Tall Stature - Differential Diagnosis Algorithm

Normal Growth (BA=CA)
 • Familial Tall Stature
 • XYY Syndrome
Obese BMI
Tall Stature - Differential ... Diagnosis Algorithm ... Normal Growth ... #endocrinology ... #causes
Hypercalcemia - Differential Diagnosis Algorithm
Elevated PTH (High or normal):
 • Primary Hyperparathyroidism
 • Familial Hypocalciuric Hypercalcemia
Low
Hypercalcemia - Differential ... Diagnosis Algorithm ... Elevated PTH (High or normal ... Hypercalcemia Low ... #causes #endocrinology
Gynecomastia - Differential Diagnosis a
nd Workup Algorithm
Gynecomastia is common in clinical practice, affecting ~50% of males
Gynecomastia - Differential ... affecting ~50% of males ... How to approach? ... Labs: TSH, Cr, LFTs ... #endocrinology
Causes of Anemia by Mean Corpuscular Volume (MCV) - Differential Diagnosis Algorithm
Low Mean Corpuscular Volume (<80
Causes of Anemia ... Diagnosis Algorithm ... Low Mean Corpuscular ... Chronic Disease Normal ... Liver Disease • Hypothyroidism
Adrenal Insufficiency Differential Diagnosis Algorithm
Clinical suspicion: Weakness, fatigue, nausea, musculoskeletal pain, dizziness, volume depletion, abdominal pain,
Insufficiency Differential ... Diagnosis Algorithm ... Weakness, fatigue, nausea ... or normal baseline ... #endocrinology