Colon tumor
Carcinoma
Micropapillary carcinoma


Topic Completed: 1 May 2015

Revised: 26 June 2019

Copyright: 2002-2019, PathologyOutlines.com, Inc.

PubMed Search: Micropapillary carcinoma [title] colon


Raul S. Gonzalez, M.D.
Page views in 2018: 937
Page views in 2019 to date: 844
Cite this page: Gonzalez R. Micropapillary carcinoma. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/colontumormicropapillary.html. Accessed October 16th, 2019.
Definition / general
  • Uncommon subtype of colonic adenocarcinoma with distinctive behavior
  • Officially recognized in WHO classification
Epidemiology
Pathophysiology
Case reports
Microscopic (histologic) description
  • Small clusters of malignant cells with abundant eosinophilic cytoplasm and pleomorphic nuclei
  • Micropapillae inhabit lacunar-like spaces and demonstrate a "reverse polarity" configuration, with apical surfaces facing the periphery rather than the center
  • Lymphovascular invasion is commonly present
  • Morphology is similar to micropapillary carcinomas of other organs (Adv Anat Pathol 2004;11:297)
  • Coexisting regions of conventional adenocarcinoma also usually present
Microscopic (histologic) images

Images hosted on other servers:

Invasive micropapillae in lacunar-like spaces

Lymph node metastasis

Characteristic morphology and MUC1 immunostaining pattern

Positive stains
Molecular / cytogenetics description
Differential diagnosis
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