Topic Completed: 1 September 2015

Minor changes: 1 October 2020

Copyright: 2002-2021,, Inc.

PubMed Search: Mucinous carcinoma [title] colon

Raul S. Gonzalez, M.D.
Page views in 2020: 11,960
Page views in 2021 to date: 772
Cite this page: Gonzalez R. Mucinous. website. Accessed January 22nd, 2021.
Definition / general
  • WHO recognized subtype of colorectal carcinoma with mucin lakes comprising at least 50% of tumor mass
  • Variably called "colloid carcinoma"
Clinical features
Prognostic factors
Case reports
Gross description
  • Exophytic, gelatinous mass
Gross images

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Causing intussusception

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Cecal tumor

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Arising in villous adenoma

Microscopic (histologic) description
  • Adenocarcinoma with strips of tumor cells floating in large extracellular mucin lakes comprising at least half of tumor mass
  • Signet ring cells (with intracellular mucin) may also be present but should comprise less than half of tumor
Microscopic (histologic) images

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Pools of mucus

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Low power

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Extracellular mucin

Positive stains
Molecular / cytogenetics description
Differential diagnosis
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