Abstract
Rhabdomyolysis involves skeletal muscle breakdown leading to high serum creatine kinase (CK) levels and myoglobinuria. Here, we report the case of a middle-aged man who developed rhabdomyolysis, resulting in acute kidney injury (AKI) over pre-existing chronic kidney disease (stage 3a) secondary to focal segmental glomerulosclerosis (primary FSGS), during an asymptomatic COVID-19 infection. The patient had been on treatment with cyclosporine and statin, among other drugs, for his comorbidities. He had initially presented to the hospital after a fall due to difficulty walking in the setting of increasing edema. Lab workup revealed elevated CK and AKI. Urinalysis showed "large" blood on a dipstick with only two RBCs per high-power field on microscopy, suggesting myoglobinuria. A standard respiratory pathogen polymerase chain reaction panel revealed positive SARS-CoV-2. The chest X-ray and oxygenation were normal, and he had no respiratory symptoms. He was treated with intravenous fluids and albumin, with a steady improvement in renal function. Our case underlines that rhabdomyolysis can occur in asymptomatic COVID-19 infection. Therefore, it may be worth monitoring CK levels in COVID-19-positive patients with risk factors for rhabdomyolysis, such as the concurrent usage of statins and cyclosporine, even if they are otherwise asymptomatic.