• Thyroiditis comprises a diverse group of disorders:
    • That are among the most common endocrine abnormalities encountered in medical endocrine clinical practice as well as by surgeons managing the thyroid
    • These disorders range from:
      • The extremely common chronic lymphocytic thyroiditis (Hashimoto’s thyroiditis) to the extremely rare invasive fibrous thyroiditis (Riedel’s thyroiditis) 
    • Clinical presentations are also diverse:
      • Ranging from an incidental finding of a goiter to potentially life-threatening illness:
        • From hypothyroidism to thyrotoxicosis.
    • The term thyroiditis implies:
      • That the disorders are inflammatory processes involving the thyroid gland:
        • Although some of the lesions are not inflammatory and are included in the thyroiditis category largely for convenience.
    • A rational approach to such patients:
      • Including history, physical examination, laboratory evaluation, radionuclide or ultrasonographic imaging, and fine-needle aspiration biopsy:
        • Will allow the appropriate diagnosis to be made in the majority of cases.
Chronic lymphocytic thyroiditis (Hashimoto’s thyroiditis)
Subacute lymphocytic thyroiditis:
— Postpartum thyroiditis
— Sporadic silent thyroiditis
Subacute granulomatous thyroiditis (De Quervain’s thyroiditis)
Drug-induced thyroiditis
Radiation thyroiditis
Acute suppurative / infectious thyroiditis:
— Bacterial, fungal, parasitic
Invasive fibrous thyroiditis (Riedel’s thyroiditis)
— Sarcoid, amyloid, traumatic, and palpation-induced thyroiditis
























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