Endocrinology Book

http://www.fpnotebook.com/

Subacute Lymphocytic ThyroiditisAka: Silent Sporadic Thyroiditis, Painless Sporadic Thyroiditis

Advertisement

  1. Pathophysiology
    1. Autoimmune lymphocytic infiltrate
  2. Epidemiology
    1. More common in women by 4 fold
  3. Signs
    1. Goiter (50%)
    2. Hyperthyroidism (up tp 20%)
      1. Duration: Typically <4 months
      2. Followed by Hypothyroidism and then euthyroid
  4. Differential Diagnosis
    1. Postpartum Thyroiditis
      1. Nearly identical, except limited to postpartum period
    2. Hashimoto's Thyroiditis
      1. Similar, except pathology (Fibrosis, Hurthle Cells)
    3. Grave's Disease
      1. Presents with pretibial edema, Proptosis
    4. Subacute Thyroiditis
      1. Painful Thyroiditis
  5. Labs
    1. Thyroid Function Tests (T4 Free and TSH)
    2. Antibodies
      1. Antithyroid Peroxidase Antibody (positive in 50%)
      2. Thyroid Stimulating Immunoglobulins absent
        1. Contrast with Grave's Disease
  6. Imaging
    1. Radioiodine Uptake (Thyroid uptake and scan)
      1. Low uptake (contrast with Grave's Disease)
  7. Course
    1. Resolves within 1 year in most cases
  8. References
    1. Bindra (2006) Am Fam Physician 73(10):1769

Navigation Tree