follicular adenoma


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  • Gross

    • submit entire capsule
  • Histology

    • encapsulated
    • no capsule invasion
    • architecture
      • trabecular
      • solid
      • microfollicular
      • macrofollicular
    • uniform cytology
    • variants
      • Hurthle cell adenoma
      • atypical adenoma
      • toxic adenoma
  • Stains

    • TTF1+
    • thyroglobulin+
    • cytokeratin+
  • Ddx

  • Associations

    • iodine deficiency
    • Cowden disease
      • hamartoma
      • PTEN