Cutaneous and serological profiles of idiopathic inflammatory myopathies in a hispanic population.

INTRODUCTION

In the diagnosis and management of idiopathic inflammatory myopathies, cutaneous manifestations are particularly significant. Clinical signs are often associated with specific autoantibodies and play a role in the classification, treatment, and prognosis of IIM.

OBJECTIVE

Describe the cutaneous clinical presentation, phototype, and autoantibody profiles among Hispanic patients with IIM.

METHODS

A cross-sectional study was conducted from January 2015 to November 2022, including 64 patients diagnosed with IIM. Rheumatological and dermatological evaluations were performed, assessing Fitzpatrick phototype and Cutaneous Dermatomyositis Activity and Severity Index (CDASI) scores. Autoantibodies were analyzed using immunoblotting.

RESULTS

Dermatomyositis (DM) was the most common subtype (73.4%). Fitzpatrick phototypes IV (59.4%) and III (37.5%) predominated. CDASI scores indicated mild dermatological activity in 60.9% of cases. Cluster analysis identified four patient groups with distinct clinical and serological profiles.

CONCLUSION

IIM have a complex disease expression. Recognizing its heterogeneities can enhance personalized treatment approaches.