Observational study and brief analysis of diagnostic criteria in relapsing polychondritis.

Observational study of patients with relapsing polychondritis (RPC) and brief evaluation of widely used diagnostic criteria. A retrospective analysis of 18 patients with RPC treated in the past 15 years at the Charté-Universitätsmedizin Berlin was performed. Three different diagnostic criteria were applied to our cohort. Sensitivities of diagnostic criteria of McAdam et al., Damiani and Levine and Michet et al. were calculated as well as the 5- and 10-year survival. Analysis of diagnostic criteria revealed a sensitivity of 88.9% using Damiani and Levine criteria, 66.7% for Michet et al. and 50% for McAdam et al., respectively. Modifying the criteria of Michet et al. increases the sensitivity to 88.9%. The 5- and 10-year survival were 100 and 90.9%, respectively. Current diagnostic criteria in RPC should be reappraised covering the diversity of clinical findings with the aim to improve clinical care and research in RPC.