Methicillin-resistant Staphylococcus aureus as a cause of a quadriceps tendon tear.

Methicillin-resistant Staphylococcus aureus (MRSA) is an important causative agent in myositis and pyomyositis, but its involvement in quadriceps tendon tears has not been reported until now. In the case reported here, accurate diagnosis was delayed because of the unique presentation, and the infection was mismanaged with corticosteroids because of the presumptive diagnosis of an inflammatory pathology. Subsequently, aggressive surgical and antibiotic management produced a satisfactory outcome. Early detection and appropriate management of these infections are extremely important in preventing limb- and life-threatening consequences.