Apple core sign (colon)

Changed by Daniel J Bell, 16 Oct 2017

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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’s disease
chronic ulcerative colitis
ischaemic colitis
~~Chlamydia~~chlamydia infection
colonic tuberculosis
~~Helminthoma~~helminthoma
colonic amoebiasis
colonic cytomegalovirus
villous adenoma
radiosurgery, such as high doses of Cyberknife used for treating unresectable abdominal malignancies

~~-<li><a href="/articles/crohn-disease-1">Crohn’s disease</a></li>~~
+<li><a href="/articles/crohn-disease-1">Crohn disease</a></li>
~~-<li>Chlamydia infection</li>~~
+<li>chlamydia infection</li>
~~-<li>Helminthoma</li>~~
+<li>helminthoma</li>
~~-<li>radiosurgery such as high doses of Cyberknife used for treating unresectable abdominal malignancies</li>~~
+<li>radiosurgery, such as high doses of Cyberknife used for treating unresectable abdominal malignancies</li>

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Apple core sign (colon)

Updates to Article Attributes

Differential diagnosis

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