Anti-HMGCR IMNM is a rare myositis induced by statins or food and dietary substances in which statins are present (ie, Oyster mushroom, red yeast rice, and Pu-erh tea).3, 4, 5 IMNM is characterized by proximal muscle weakness, elevated creatinine kinase level (more than 2000 IU/L in 90% of cases), and abundant necrosis of muscle fibers with minimal inflammatory infiltrate on muscle biopsy.5 This evidence concerns the gene HMGCR and myositis disease.