Colon tumor
Carcinoma
Signet ring carcinoma

Author: Raul Gonzalez M.D. (see Authors page)

Revised: 3 January 2017, last major update August 2015

Copyright: (c) 2002-2017, PathologyOutlines.com, Inc.

PubMed Search: "Signet ring carcinoma" colon
Cite this page: Signet ring carcinoma. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/colontumorsignetring.html. Accessed April 29th, 2017.
Definition / general
Terminology
  • Sometimes called "linitis plastica," but this typically refers to signet ring carcinoma of stomach
Epidemiology
Sites
  • Can occur anywhere in colon, though rectum is a less common location
Etiology
Clinical features
Diagnosis
Prognostic factors
Case reports
Clinical images

Images hosted on other servers:

Pedunculated polyp

Stenotic rectal carcinoma

Polyp in proximal sigmoid colon

Discolored lesion

Gross description
  • May diffusely infiltrate colon wall, rather than forming an exophytic mass
  • Can rarely arise within a polyp
Microscopic (histologic) description
  • Proliferation of signet ring cells with intracellular mucin that displaces nucleus to side
  • Pools of extracellular mucin often present as well
  • Diffuse tissue infiltration less common than in gastric signet ring carcinoma
  • May rarely be in situ or confined to a polyp (J Surg Res 2010;163:250)
  • No gland formation in signet ring component, although it may be present elsewhere in the same lesion
Microscopic (histologic) images

Images hosted on other servers:

Numerous mucinous pools

Signet ring cells floating

Signet ring carcinoma

Multilobulation

For comparison,
normal colonic glands
with signet ring cells, CK7

Virtual slides

Images hosted on other servers:

Mixed mucinous signet ring adenocarcinoma

Negative stains
Molecular / cytogenetics description
Differential diagnosis