Table of ContentsDefinition / general | Gross description | Microscopic (histologic) description | Positive stains | Negative stains
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
- 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)