Breast malignant, males, children
In situ carcinoma
Mucinous DCIS

Author: Dina Kandil, M.D. (see Authors page)

Revised: 18 October 2016, last major update January 2012

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PubMed Search: Mucinous DCIS

Cite this page: Mucinous DCIS. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/breastmalignantmucinousDCIS.html. Accessed December 7th, 2016.
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)
Epidemiology
  • 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)
Micro Images

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DCIS (micropapillary) with
invasive mucinous carcinoma

Differential Diagnosis