Apple core sign (colon)
The apple core sign, also known as a napkin ring sign (bowel), is most frequently associated with constriction of the lumen of the colon by a stenosing annular colorectal carcinoma.
Differential diagnosis
The appearance of the apple-core lesion of the colon also can be caused by other diseases 3:
- lymphoma with colonic involvement - appears more diffuse
- Crohn disease
- chronic ulcerative colitis
- ischaemic colitis
- chlamydia infection
- colonic tuberculosis
- helminthoma
- colonic amoebiasis
- colonic cytomegalovirus
- villous adenoma
- radiosurgery, such as high doses of Cyberknife used for treating unresectable abdominal malignancies
See also
Related articles
Barium studies
- pharynx
- swallowing study
- esophagus
- normal esophageal contours
- motility disorders
- achalasia
- esophageal stricture
- mucosal patterns
- stomach
- duodenum
- duodenal ulcer
- small bowel
- mucosal patterns
- colon
- colonic narrowings
- technique
- pharyngogram
- esophagram
- upper GI study / barium meal
- small bowel follow through
- barium enema
- defecography
Inspired signs
-
inanimate object inspired
- champagne glass pelvis
- Coca-Cola bottle sign
- coin lesion
- corduroy sign
- dinner fork deformity
- fishhook ureters
- goblet sign
- hockey stick sign (Creutzfeldt-Jakob disease)
- hockey stick sign (thyroid hemiagenesis)
- leather bottle stomach
- Lincoln log vertebra
- napkin ring sign
- open book fracture
- polka-dot sign
- rugger-jersey spine
- sack of marbles sign
- scalpel sign
- spilled teacup sign
- string of pearls sign
- tam o' shanter sign
- telephone receiver deformity
- tombstone iliac wings
- water bottle sign
-
weapon and munition inspired signs
- bayonet deformity
- bullet-shaped vertebra
- cannonball metastases
- dagger sign
- double barrel sign
- panzerherz
- pistol grip deformity
- saber-sheath trachea
- scimitar syndrome
-
target sign (disambiguation)
- double target sign (hepatic abscess)
- eccentric target sign (cerebral toxoplasmosis)
- reverse target sign (cirrhotic nodules)
- target sign (choledocholithiasis)
- target sign (hepatic metastases)
- target sign (intussusception)
- target sign (neurofibromas)
- target sign (pyloric stenosis)
- target sign (tuberculosis)
- trident acetabulum
- trident hand
- trident sign
- white pyramid sign
- wine bottle sign
-
vegetable and plant inspired
- aubergine sign
- celery stalk anterior cruciate ligament
- celery stalk metaphysis
- chocolate cyst
- coconut left atrium
- coffee bean sign
- cottage loaf sign
- cotton wool appearance
- doughnut sign (bone)
- doughnut sign (bowel)
- drooping lily sign
- ivy sign
- linguine sign
- macaroni sign
- miliary opacities
- omental cake
- onion skin periosteal reaction
- pancake adrenal
- pancake brain
- pancake vertebra
- popcorn calcification
- rice bodies
- rice grain calcification
- salt and pepper skull
- tree-in-bud
- waterlily sign
- fruit inspired
-
animal and animal produce inspired
- human
- fish and seafood
- birds
- domesticated and wild animals
- anteater nose sign
- bat wing opacities
- bear paw sign
- bull's eye sign (disambiguation)
- claw sign
- eye of tiger sign
- feline oesophagus
- hide-bound sign
- panda sign (midbrain)
- panda sign (sarcoidosis)
- pleural mouse
- Scotty dog sign
- stag's antler sign
- staghorn calculus
- rat bite erosions
- rat-tail sign
- winking owl sign
- insects
- reptiles
- mythical creatures
- food inspired
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