Causes of thyroiditis according to the presence or absence of pain and tenderness

Disorder	Synonyms or causes
Thyroid pain and tenderness
Subacute thyroiditis	Subacute granulomatous thyroiditis
	Subacute nonsuppurative thyroiditis
	de Quervain's thyroiditis
Infectious thyroiditis	Acute or chronic thyroiditis
Radiation-induced thyroiditis
Palpation- or trauma-induced thyroiditis
No thyroid pain and tenderness
Painless thyroiditis	Silent thyroiditis
	Lymphocytic thyroiditis with spontaneously resolving hyperthyroidism
	Subacute lymphocytic thyroiditis
Occurring postpartum	Postpartum thyroiditis
Associated with drugs	Interferon alfa
	Interleukin 2
	Lithium
	Tyrosine kinase inhibitors
	Checkpoint inhibitor immunotherapy
Chronic lymphocytic thyroiditis	Hashimoto's thyroiditis
Postpartum exacerbation	Postpartum thyroiditis
Amiodarone-associated thyroiditis	Type 2 amiodarone-induced thyrotoxicosis
Fibrous thyroiditis	Riedel's thyroiditis, IgG4-related disease
Fibrous thyroiditis	Invasive thyroiditis

IgG4: immunoglobulin G4.

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