Thyroid gland
Other carcinoma
Well differentiated carcinoma, NOS

Author: Shuanzeng Wei, M.D., Ph.D. (see Authors page)
Editor: Zubair W. Baloch, M.D., Ph.D.

Revised: 17 February 2017, last major update October 2016

Copyright: (c) 2002-2017,, Inc.

PubMed Search: NOS thyroid

Cite this page: Well differentiated carcinoma, NOS. website. Accessed May 21st, 2018.
Definition / general
  • Encapsulated follicular derived neoplasm with tumor capsular or vascular invasion and questionable nuclear features of papillary carcinoma (Endocr Pathol 2005;16:279)
  • Malignant, but cannot distinguish between papillary and follicular carcinoma
  • Terminology proposed by Chernobyl pathologists (Int J Surg Pathol 2000;8:181)
Essential features
  • Follicular derived carcinoma with hybrid features of both follicular carcinoma and minor nuclear features of papillary carcinoma
Microscopic (histologic) images

Images hosted on PathOut servers:

Questionable nuclear features
of papillary carcinoma
contributed by
Shuanzeng Wei, M.D., Ph.D.

Differential diagnosis