Difference between revisions of "Follicular thyroid carcinoma"

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*Female predominant.
*Female predominant.
*Favourable prognosis.
*Favourable prognosis.
==Gross==
*Encapuslated lesion +/-evidence of invasion through the capsule.
===Images===
<gallery>
Image: Follicular adenoma of the thyroid.jpg | FTC - gross. (WC/Euthman)
</gallery>


==Microscopic==
==Microscopic==

Revision as of 03:56, 4 March 2015

Follicular thyroid carcinoma, abbreviated FTC, is an uncommon malignancy of the thyroid gland. It is also known as follicular carcinoma.

General

  • Usually spread by the hematologic route.
    • PTC usually spreads via lymphatics.

Clinical

Medical school memory device 4 Fs:

  • FNA NOT diagnosable.
  • Far away mets (sometimes).
  • Female predominant.
  • Favourable prognosis.

Gross

  • Encapuslated lesion +/-evidence of invasion through the capsule.

Images

Microscopic

Features:

  • Defined by either:
    1. Invasion through the capsule:
      • Should be all the way through.[1]
        • 1/2 does not count.
        • Fibrous reaction does not count.
        • "Above the contour" does not count.
    2. Vascular invasion (all of the following):
      1. In a small vein (not a capillary), that is outside of the tumour mass.
      2. Tumour adherent to the side of the vessel.
      3. Tumour must be re-endothelialized.

Notes:

  • Impossible to differentiate from follicular adenoma on FNA (no cytologic differences).
  • Described as "over-diagnosed" ... misdiagnoses: PTC follicular variant, follicular adenoma, multinodular goitre with a thick capsule.

Images

www:

See also

References

  1. SR. 17 January 2011.