Thyroid & parathyroid

Other thyroid carcinoma


Mixed medullary-follicular tumors

Topic Completed: 1 March 2009

Minor changes: 24 September 2020

Copyright: 2003-2021,, Inc.

PubMed Search: mixed medullary-follicular tumor

Related Topic: Medullary carcinoma

Shahid Islam, M.D., Ph.D.
Page views in 2020: 634
Page views in 2021 to date: 885
Cite this page: Islam S. Mixed medullary-follicular tumors. website. Accessed October 25th, 2021.
Definition / general
  • Aggressive
Case reports
Microscopic (histologic) images

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

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