Myositis-specific antibodies and clinical characteristics in patients with autoimmune inflammatory myopathies: reported by the Argentine Registry of Inflammatory Myopathies of the Argentine Society of Rheumatology.

Introduction/objectives: To describe clinical features in patients with inflammatory myopathies (IMs) from the Argentine Registry of Inflammatory Myopathies, and their relationship with myositis-specific antibodies (MSAs).

Methods: This cross-sectional study included 360 adult patients with dermatomyositis (DM), polymyositis (PM), and inclusion body myositis. Demographics, clinical, and serological characteristics were retrospectively recorded (2016-2019).

Immune diffuse alveolar hemorrhage: Clinical presentation and outcome.

Background: Diffuse alveolar haemorrhage (DAH) is a manifestation of several immune and nonimmune diseases.

Objective: The objective of this study was to characterize the clinical characteristics and short-term outcomes of patients with immune-mediated DAH requiring hospital admission.

Methods: A retrospective study from December 2010 to December 2015, was conducted by analyzing the clinical records of 39 patients with DAH with a proven immunological origin.