Path
     Early follicular thyroid cancer have an early hematogenous spread to the lung, brain and bone.
Histo
     Demonstration of invasion of capsule and blood vessels is required to differente follicular cancers from benign follicular adenomas.
     FNAB often shows large numbers of normal-appearing follicular cells, which is commonly labeled as "follicular neoplasm"; however, it may be difficult (and even impossible) to differentiate follicular cancers from adenoma using FNAB.
     Unlike papillary cancer, follicular cancer is encapsulated, and does not have distinctive nuclear features.

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