[Pain assessment in Down Syndrome patients: a narrative review of the literature].

Objective: The paper provides a description of available measurement tools which are able to adequately assess acute chronic pain in Down Syndrome (DS) patients, regardless of their age and cognitive impairment.

Methods: Papers referring to DS patients were sought using different databases, such as PubMed, CINAHL, Scopus, Web of Science (ISI) and Cochrane, with no limit of time and published up to October 2017. All validated tools applicable to DS patients were included in the search, which consisted of papers published both in English and Italian.