Authors: Dr. Ma. Bianca Isabelle Olalia , Dr. Roemer Tanghal

Abstract

Infectious myositis is a rare condition caused by various pathogens, including influenza, and may lead to rhabdomyolysis with a risk of acute kidney injury. This case report details a middle-aged Filipino woman who developed life-threatening rhabdomyolysis after getting Influenza A infection. The patient with a recent travel history in Australia, presented with bilateral leg cramps, fasciculations, and severe muscle pain causing difficulty to ambulate. Workup showed elevated creatinine kinases, creatinine, as well as a positive Influenza A Antigen test. Treatment involved aggressive hydration, pain management, and antiviral therapy. This case highlights the importance of recognizing influenza-associated myositis in patients presenting with unexplained muscle symptoms and elevated creatine kinase, emphasizing early diagnosis and intervention to prevent severe complications.

Keywords: : Influenza A, Myositis, Rhabdomyolysis