Breast malignant, males, children
In situ carcinoma
Mucinous DCIS

Topic Completed: 1 January 2012

Minor changes: 25 June 2020

Revised: 21 January 2019

Copyright: (c) 2002-2019,, Inc.

PubMed Search: Mucinous DCIS

Dina Kandil, M.D.
Page views in 2020 to date: 8
Cite this page: Kandil D OLD Mucinous. website. Accessed August 7th, 2020.
Definition / general
  • DCIS with extracellular mucin production
  • Mucin is usually in lumens of ducts involved by DCIS; also in vessels
  • There are few studies of this entity (Histopathology 1996;29:533)
  • Mean age 62 years
  • Predominant histologic types are solid, cribriform and micropapillary
  • DCIS grading - low grade / 1 (29%), intermediate grade / 2 (61%), high grade / 3 (10%)
Clinical features
  • Often associated with neovascularization in intraluminal mucin, although the presence of vascularized mucin in a needle biopsy cannot differentiate between in situ and invasive disease (Histopathology 2008;53:545)
Microscopic (histologic) images

DCIS (micropapillary) with
invasive mucinous carcinoma

Differential diagnosis
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