Difference between revisions of "Thyroid gland"

Thyroid gland (view source)

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 ==Follicular thyroid carcinoma==
 *[[AKA]] ''follicular carcinoma''.
-===Clinical===
+{{Main|Follicular thyroid carcinoma}}
-Medical school memory device ''4 Fs'':
-*FNA NOT diagnosable.
-*Far away mets (sometimes).
-*Female predominant.
-*Favourable prognosis.
-Notes:
-*Usu. has a hematologic spread.
-**PTC usu. spread via lymphatics.
-===Microscopic===
-Features:
-*Defined by either:
-*#Invasion through the capsule:
-*#*Should be all the way through.<ref>SR. 17 January 2011.</ref>
-*#**1/2 does not count.
-*#**Fibrous reaction does not count.
-*#**"Above the contour" does not count.
-*#Vascular invasion (all of the following):
-*##In a small vein (not a capillary), that is outside of the tumour mass.
-*##Tumour adherent to the side of the vessel.
-*##Tumour must be re-endothelialized.
-Notes:
-*'''Impossible''' to differentiate from ''[[follicular thyroid adenoma|follicular adenoma]]'' on FNA (no cytologic differences).
-*Described as "over-diagnosed" ... misdiagnoses: PTC follicular variant, follicular adenoma, multinodular goitre with a thick capsule.
-Images:
-*[http://path.upmc.edu/cases/case653.html Follicular thyroid carcinoma - several images (upmc.edu)].
 ==Medullary thyroid carcinoma==