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Members discussed the clinical features of arthritis mutilans and definitions used by researchers to date; reviewed data from the ClASsification for Psoriatic ARthritis study, the Nordic psoriatic arthritis mutilans study, and the results of a premeeting survey; and participated in breakout group discussions. Through this exercise, GRAPPA members developed a broad consensus on the features of arthritis mutilans, which will help us develop a GRAPPA-endorsed definition of arthritis mutilans.<\/jats:p>","DOI":"10.3899\/jrheum.130453","type":"journal-article","created":{"date-parts":[[2013,8,1]],"date-time":"2013-08-01T07:28:07Z","timestamp":1375342087000},"page":"1419-1422","source":"Crossref","is-referenced-by-count":14,"title":["Arthritis Mutilans: A Report from the GRAPPA 2012 Annual Meeting"],"prefix":"10.3899","volume":"40","author":[{"given":"Vinod","family":"Chandran","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dafna D.","family":"Gladman","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Philip S.","family":"Helliwell","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bj\u00f6rn","family":"Gudbj\u00f6rnsson","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"2262","published-online":{"date-parts":[[2013,8,1]]},"reference":[{"key":"2018112909320988000_40.8.1419.1","doi-asserted-by":"publisher","DOI":"10.1016\/0049-0172(73)90035-8"},{"key":"2018112909320988000_40.8.1419.2","unstructured":"Wright V Moll JM . 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