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[[Pyoderma gangrenosum]] is a less common skin problem, occurring in under 2%,<ref name="PMID30682031" /> and is typically a painful ulcerating nodule.<ref name="Thrash2013" /><ref name="Harbord" />
[[Nail clubbing|Clubbing]], a deformity of the ends of the fingers, may also be a result of Crohn's disease.{{Citation needed|date=February 2024}}
[[psoriasis]] It is one of the most common within CD and UC.
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