Thyroid Nodule Assessment
- Thyroid-Stimulating Hormone (TSH)
 - Ultrasound
 - Fine Needle Aspiration
 - Most Accurate Test
 - Radioactive Iodine Uptake (RAIU)
 - Hot Nodules Rarely Malignant
 - Free T3 and T4
 - Repeat Ultrasound 6 -18 Months
 
Thyroid Function Screening Tests
- If TSH High
 - Free T4 (FT4)
 - If TSH Low
 - Free T4 (FT4) and T3 (Triiodothyronine)
 - Consider Serum Total T4 (Thyroxine)
 - Only Total T4 Increases in Pregnancy
 - T4 is Converted to T3
 - Avoid for Inpatient Screening
 
Hypothyroidism Assessment
- Weight Gain - Edema
 - Lethargy
 - Cold Intolerance
 - Bradycardia
 - Hypertension
 - Brittle Nails and Dry Skin
 - Constipation
 - Goiter
 - Prolonged Menses
 - Slowed Thinking
 - Decreased Free T4
 - Increased TSH
 
Hypothyroidism Intervention
- Levothyroxine (Synthroid)
 - Liothyronine (Cytomel)
 - Myxedema Coma
 - Lifelong Replacement Hormone
 - Monitor Vital Signs
 - Fluids and Fiber
 - Low Calorie, Low Fat Diet
 - Medication Education
 - No Switching Brands
 
Hyperthyroidism Assessment
- Heat Intolerance
 - Exophthalmos
 - Warm, Moist Skin and Silky Hair
 - Tremors
 - Goiter
 - Diarrhea
 - Weight Loss
 - Tachycardia
 - Hypertension
 - Amenorrhea
 - Decreased TSH with Elevated Free T4
 - Radioactive Iodine Uptake (RAIU)
 
Hyperthyroidism Interventions
- Propylthiouracil (PTU)
 - Methimazole (Tapazole)
 - Iodine
 - Beta Blockers
 - Radioiodine Ablation
 - Thyroidectomy
 - Thyrotoxicosis
 - Post-Surgery Hypocalcemia
 
Hashimoto's Thyroiditis
- Hypothyroidism with Bouts of Hyperthyroidism
 - Enlarged, Nontender Thyroid
 - Autoimmune
 - Anti-Thyroid Peroxidase (TPO)
 - Anti-Thyroglobulin
 - Hurthle Cells
 - Lymphoid Follicles
 - HLA-DR5 and HLA-DR3
 - Increased Risk Of Non-Hodgkin Lymphoma
 
Graves' Disease Characteristics
- Women 20-40 years old
 - Anti-TSH Receptor Antibodies
 - Ophthalmopathy
 - Exophthalmos
 - Hyperthyroidism
 - Goiter
 - Pretibial Myxedema
 
Graves' Disease Labs and Treatment
- Decreased TSH
 - Increased T3
 - Increased T4
 - Radioactive Iodine Uptake (RAIU)
 - Beta blocker
 - Methimazole
 - Radioiodine Ablation
 
Thyroid Storm
- Diarrhea
 - Liver Failure
 - Insulin Resistance
 - Tachycardia
 - Lid lag
 - Change in LOC (Altered Mental Status)
 - High fever
 - Propranolol (Or Esmolol)
 - PTU  (Thionamides) Initially
 - Iodine Solution (Lugol Iodine)
 - Glucocorticoids
 - Cooling Blanket
 
Thyroid Storm Causes
- Sepsis
 - Thyroid Trauma
 - Surgery
 - Childbirth
 - Grave's Disease
 - Excessive Thyroid Hormone Ingestion
 - TSH-secreting Tumors
 - Hyperfunctioning Goiter or Nodule
 - McCune Albright Syndrome
 
Papillary Thyroid Carcinoma
- Most Common Thyroid Cancer
 - Excellent Prognosis
 - Lymphatic Spread
 - Orphan Annie Nuclei
 - Empty Nuclei with Central Clearing
 - Psammoma Bodies
 - Head and Neck Radiation
 - RET and BRAF Mutations
 - Gardner Syndrome
 - Cowden Syndrome
 
Medullary Thyroid Carcinoma
- Sporadic and Familial Types
 - Arises from Parafollicular C cells
 - Produces Calcitonin
 - Hypocalcemia
 - May Produce ACTH
 - Sheets of Cells With Amyloid Deposition
 - Increased Calcitonin with Pentagastrin Infusion
 - MEN 2A and 2B
 
Follicular Thyroid Carcinoma
- Most Common to Present as Solitary Cold Nodule
 - Hematogenous Spread
 - Good Prognosis
 - Uniform Follicles
 - May Invade Capsule
 - Head and Neck Radiation
 
Anaplastic Thyroid Cancer
- Rapidly Progressive
 - Poor Prognosis
 - Hoarseness
 - Invades Local Structures
 - Mixed Morphology
 - Multinodular Goiter
 - Older Age
 - History of Thyroid Disease
 
Primary Hyperparathyroidism
- Hypercalcemia
 - Kidney Stones
 - Osteoporosis
 - Arrhythmias
 - Increased Calcium and Decreased Phosphorus
 - Prevent Injury
 - Medication Education
 - Surgery
 
Hypoparathyroidism
- Hypocalcemia
 - Lethargy
 - Tetany
 - Arrhythmias
 - Decreased Calcium and Increased Phosphorus
 - IV Calcium Chloride
 - Rebreather Mask
 - Lifelong Medications
 - Oral Calcium Supplements with Vitamin D
 
MEN 1 (Multiple Endocrine Neoplasia)
- Autosomal Dominant
 - Menin Mutation (Tumor Suppression Gene)
 - Chromosome 11
 - Pancreatic Endocrine Tumors
 - Pituitary Tumors
 - Parathyroid Adenomas
 
MEN 2A (Multiple Endocrine Neoplasia)
- Autosomal Dominant
 - RET Gene
 - Medullary Thyroid carcinoma
 - Calcitonin
 - Parathyroid
 - Pheochromocytoma
 
Thymic Aplasia (DiGeorge Syndrome)
- DiGeorge Syndrome
 - 22q11 Deletion
 - Failure to Develop Third and Fourth Pharyngeal Pouches
 - Undeveloped Thymus
 - T Cell Deficiency
 - Recurrent Viral and Fungal Infections
 - Undeveloped Parathyroids
 - Hypocalcemia
 - Tetany
 - Aortic Defects
 - Congenital Heart Defects
 - Absent Thymic Shadow on CXR
 
Subacute Lymphocytic Thyroiditis
- Drugs
 - Autoimmune Disorders
 - Postpartum Thyroiditis
 - Hyperthyroidism and Hypothyroidism
 - Painless Thyroid
 - Thyroid Function Tests
 - Elevated ESR
 - Decreased Radioactive Iodine Uptake (RAIU)
 - Lymphocytic Infiltrate
 - Beta Blockers
 - Levothyroxine
 - Avoid Antithyroid Drugs
 
Riedel Thyroiditis
- Autoimmune
 - IgG4
 - Fibrous Invasion of Thyroid
 - Very Firm on Palpation
 - Nontender
 - Slowly Enlarging Mass
 - Invades Local Structures
 - Hypothyroidism
 - Fibrous Tissue
 - Eosinophilic Infiltrate
 - Prednisone
 - Tamoxifen
 - Surgery