Follicular Lesions

Chapter
Part of the Essentials in Cytopathology book series (EICP, volume 8)

Abstract

Follicular carcinoma (FC) is the second most common malignancy of the thyroid after papillary thyroid carcinoma (PTC), representing approximately 15% of all thyroid carcinomas. Most FCs are minimally invasive and are categorized as well-differentiated tumors that have an excellent prognosis. A small subset of FCs, however, are widely invasive carcinomas (i.e., grossly recognizable as carcinomas) with a much more aggressive clinical course. In addition, the classic subtype of poorly differentiated thyroid carcinoma is insular carcinoma, a rare, aggressive follicular-derived tumor.

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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  1. 1.Department of PathologyThe Johns Hopkins Medical InstitutionsBaltimoreUSA
  2. 2.Department of Pathology Harvard Medical SchoolMassachusetts General HospitalBostonUSA

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