Fat halo sign

WikiDoc Resources for Fat halo sign
Articles
Most recent articles on Fat halo sign Most cited articles on Fat halo sign Review articles on Fat halo sign Articles on Fat halo sign in N Eng J Med, Lancet, BMJ
Media
Powerpoint slides on Fat halo sign Images of Fat halo sign Photos of Fat halo sign Podcasts & MP3s on Fat halo sign Videos on Fat halo sign
Evidence Based Medicine
Cochrane Collaboration on Fat halo sign Bandolier on Fat halo sign TRIP on Fat halo sign
Clinical Trials
Ongoing Trials on Fat halo sign at Clinical Trials.gov Trial results on Fat halo sign Clinical Trials on Fat halo sign at Google
Guidelines / Policies / Govt
US National Guidelines Clearinghouse on Fat halo sign NICE Guidance on Fat halo sign NHS PRODIGY Guidance FDA on Fat halo sign CDC on Fat halo sign
Books
Books on Fat halo sign
News
Fat halo sign in the news Be alerted to news on Fat halo sign News trends on Fat halo sign
Commentary
Blogs on Fat halo sign
Definitions
Definitions of Fat halo sign
Patient Resources / Community
Patient resources on Fat halo sign Discussion groups on Fat halo sign Patient Handouts on Fat halo sign Directions to Hospitals Treating Fat halo sign Risk calculators and risk factors for Fat halo sign
Healthcare Provider Resources
Symptoms of Fat halo sign Causes & Risk Factors for Fat halo sign Diagnostic studies for Fat halo sign Treatment of Fat halo sign
Continuing Medical Education (CME)
CME Programs on Fat halo sign
International
Fat halo sign en Espanol Fat halo sign en Francais
Business
Fat halo sign in the Marketplace Patents on Fat halo sign
Experimental / Informatics
List of terms related to Fat halo sign

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Overview

The fat halo sign is seen in various diseases of the bowel in which fatty infiltration of the submucosa is present. The sign has been described as typically appearing in patients with chronic inflammatory bowel disease (Crohn disease and ulcerative colitis). Although the fat halo sign can also be seen in a patient undergoing cytoreductive therapy and in graft versus host disease, the observation of this sign in the small intestine is highly diagnostic of Crohn disease and by itself is a sign of a chronic phase. When found in the colon, this sign is associated with the same diseases as those occurring in the small intestine (eg, cytoreductive therapy, graft vs host disease, and Crohn disease). Nonetheless, ulcerative colitis should be included in the differential diagnosis.

The fat halo sign is seen on computed tomographic (CT) scans of the abdomen as a thickened bowel wall demonstrating three layers: an inner and an outer layer of soft-tissue attenuation, between which lies a third layer of fatty attenuation

• 
• 
• 
• 
•