Abstract
Systemic autoimmune myopathies (SAMs) - including dermatomyositis (DM), polymyositis (PM), immune-mediated necrotizing myopathy (IMNM), and anti-synthetase syndrome (ASyS) - are rare, chronic, and highly disabling diseases that primarily affect striated skeletal muscle. These conditions are associated with significant functional impairment, reduced quality of life, and increased morbidity…