Hurthle cell metaplasia

Etiology

 thyroid congenital anomalies

• thyroglossal duct cyst

 thyroid inflammation

• thyroid inflammatory foci
• Hashimoto thyroiditis

 thyroid compensatory regenerative nodules
 thyroid hyperplasia
 thyroid neoplasia / thyroid tumors

• follicular epithelial cell neoplasms
  • Benign: follicular adenoma
  • Malignant
    • Differentiated: papillary, follicular
    • Poorly differentiated (insular)
    • Anaplastic

• parafollicular epithelial neoplasms
  • thyroid medullary carcinoma
  • thyroid mixed/composite carcinoma

• other primary epithelial neoplasms
  • primary non-epithelial neoplasms
  • thyroid secondary tumours

See also

 Hurthle cell
  thyroid anomalies