174 results
Thyroid Disorders - Differential Diagnosis Algorithm
Hypothyroidism:
 • Hasimoto’s
 • Radioactive Iodine 
 • Hypopituitarism
 • Iodine
Thyroid Disorders ... Hasimoto’s • Radioactive ... @AmyChung #Thyroid
Laboratory Evaluation of Patients for Thyroid Disease 
Hyperthyroidism:
 • Graves disease - TSH low; free T4
of Patients for Thyroid ... normal or increased radioactive ... normal or increased radioactive ... increased; decreased radioactive ... normal; decreased radioactive
Differentiation of Causes of Hyperthyroidism According to Pattern of Radionucleotide Uptake
Reduced uptake:
 • Thyroiditis
 • Exogenous
loading • Ectopic thyroid ... disease • Excess thyroid-stimulating ... adenoma #rai #radioactive
Graves' Disease Treatment
Thionamides (mainly methimazole)
 • Chance of remission in up to 2 years
 • No
2 years • No thyroid ... 40%) • Low cost Radioactive
Hyperthyroidism Overview

Clinical Manifestation of Hyperthyroidism:
 • Fatigue
 • Weight loss
 • Heat intolerance
 • Depression, nervousness
with circulating thyroid ... ↑ Free T4 • Thyroid ... suspected • Thyroid ... scintigraphy with radioactive ... Methimazole and PTU) • Radioactive
Approach to the Diagnosis of Hyperthyroidism - Differential Diagnosis and Workup Algorithm

 • Secondary Hyperthyroidism (↑↔TSH,
T3/Free T4) Radioactive ... Multinodular goiter Radioactive ... • Exogenous thyroid
Hyperthyroidism (low TSH, High T4/T3) - Diagnostic Algorithm

Radioactive iodine scan – get if concern for nodular
Diagnostic Algorithm Radioactive ... concern for nodular thyroid
Approach to Thyroid Function Tests in the Evaluation of Hyperthyroidism
 • Low TSH, Low normal T4
Approach to Thyroid ... symmetrically enlarged thyroid ... with TRAb → Radioactive
Radiation Injury
Acute Radiation Toxicity primarily affects rapidly dividing cells based on dosage
Hematopoiteic - Pancytopenia, Infection
 •
If exposed to radioactive ... iodide to prevent thyroid
Figure 2. The “laryngeal handshake,” from left to right: 1) hyoid, 2) thyroid, 3) cricoid, and
left to right: 1) hyoid ... , 2) thyroid, 3)