Thyroid gland
Other carcinoma
OLD Anaplastic carcinoma - Paucicellular variant


Topic Completed: 1 March 2009

Revised: 13 September 2019

Copyright: 2003-2019, PathologyOutlines.com, Inc.

PubMed Search: anaplastic carcinoma paucicellular variant

Related Topic: Anaplastic carcinoma

Shahid Islam, M.D., Ph.D.
Page views in 2019 to date: 1
Cite this page: Islam S OLD Anaplastic carcinoma - Paucicellular variant. PathologyOutlines.com website. http://www.pathologyoutlines.com/oldtopics/thyroidUndiffpaucicellular.html. Accessed October 19th, 2019.
Definition / general
  • Uncommon; resembles Riedel's thyroiditis
  • May be due to extensive infarction
Gross description
  • Hard fibrotic mass
Microscopic (histologic) description
  • Infiltrative, composed of acellular or necrotic fibrous tissue with hypocellular foci of mildly atypical spindle cells obliterating large blood vessels, mixed with collagen and small lymphocytes (Am J Clin Pathol 1996;105:388)
Positive stains
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