Colon non tumor
Non-neoplastic, non-congenital lesions
Infarcted epiploic appendages

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

Revised: 9 January 2017, last major update September 2013

Copyright: (c) 2003-2017,, Inc.

PubMed Search: infarcted epiploic appendages
Cite this page: Infarcted epiploic appendages. website. Accessed March 22nd, 2018.
Definition / general
  • Infarction and subsequent fat necrosis of epiploic appendages (fat containing pouches of colonic peritoneum) that may remain attached or autoamputate and lie loose in the peritoneum
  • Epiploic appendagitis: inflammation but not infarction of appendages
  • Unattached infarcted appendages are known as "peritoneal loose bodies" or "peritoneal mice" (J Clin Gastroenterol 2006;40:427)
  • Epiploic appendages are chiefly on transverse and sigmoid colon
  • Can occur on appendix (S D Med 2006;59:511)
Clinical features
  • Laparoscopy
Radiology description
Case reports
Clinical images

Images hosted on other servers:

Central calcified oval mass in the pelvis

Pelvic mass

Gross description
  • Firm, gray-white nodules that may resemble metastatic tumor
  • Loose bodies can resemble an egg
Gross images

Images hosted on other servers:

Egg shaped mass

Giant loose peritoneal body

Giant loose body attached to omentum

Round pelvic mass

Central calcifications and a distinct fat plane

Macrograph of giant loose body

Microscopic (histologic) description
  • Central infarcted adipose tissue with peripheral fat necrosis and calcification, surrounded by thick, inflamed fibrotic tissue
Microscopic (histologic) images

Images hosted on other servers:

Low power view showing rounded contour

Central fat necrosis

Circumferential fibrous tissue

Additional references