Thyroid gland
Other carcinoma
Mixed medullary-follicular tumors



Topic Completed: 1 March 2009

Revised: 15 March 2019

Copyright: 2003-2018, PathologyOutlines.com, Inc.

PubMed Search: mixed medullary-follicular tumor

Related Topic: Medullary carcinoma

Shahid Islam, M.D., Ph.D.
Page views in 2018: 345
Page views in 2019 to date: 713
Cite this page: Islam S. Mixed medullary-follicular tumors. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/thyroidmedullarymixed.html. Accessed October 21st, 2019.
Definition / general
  • Aggressive
Case reports
Microscopic (histologic) images

Images hosted on PathOut server:

AFIP Images:

Tumor cells show lobular growth pattern

Scattered early follicle-like areas

Tumor cells form colloid containing follicles

Many cells have clear cytoplasm

Immunofluorescent
staining for thyroglobulin (green)
and calcitonin (orange)

Positive stains
Differential diagnosis
  • Entrapping of thyroid follicles by medullary carcinoma
  • Medullary carcinoma with glandular growth pattern
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