Definition: Given an abstract, generate a keyword (a noun phrase) that best describes the focus or contribution of the paper. Such keywords can be directly from the given abstract or outside it.
Input: Abstract: Episodic arthritis is an uncommon manifestation of cystic fibrosis. We describe the case of a 21-year-old man with cystic fibrosis who suffered from episodic arthritis associated with vasculitic skin lesions. Aetiology is discussed with reference to the possible role of immune complex disease.

Adult