Statin-Induced Necrotizing Autoimmune Myositis

Yonatan Akivis, Meenakshi Kurup, Sabu John

Abstract


Statins are the most frequently prescribed medications for primary and secondary prevention of atherosclerotic cardiovascular disease (ASCVD). The United States Preventative Services Task Force recommends that clinicians selectively offer a statin for the primary prevention of ASCVD for adults aged 40 - 75 years with one or more cardiovascular disease risk factors and an estimated 10-year risk of a cardiovascular event of 10% or greater. Despite their ubiquity, it is estimated that approximately 6-10% of patients remain intolerant due to muscle aches. Here, we present a case of a 71-year-old female that was taking atorvastatin for a year and presented to the emergency room with proximal muscle aches and weakness. Laboratory values were significant for an elevated creatinine kinase of 4,166 U/L (reference range, 20 - 180). Her magnetic resonance imaging was significant for edema in bilateral lower extremity proximal muscles. Serology revealed a high anti-3-hydroxy-3-methylglutaryl-coenzyme A reductase antibody, confirming the diagnosis of statin-induced necrotizing autoimmune myositis. A muscle biopsy of the right vastus lateralis revealed necrotic muscle fibers. During her hospital course, she was treated with intravenous methylprednisolone, mycophenolate mofetil, and tacrolimus. Her symptoms gradually improved, and she was discharged after 14 days with a rheumatology follow-up. This is an exceedingly rare complication of statin use and has only recently received increasing attention. Here we present our experience with this disease.




J Med Cases. 2022;13(10):513-516
doi: https://doi.org/10.14740/jmc4010

Keywords


Statin-induced necrotizing autoimmune myositis; Statin; Myopathy; Anti-HMG-CoA

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