[Spontaneous infrapatellar tendon rupture in a patient with systemic lupus erythematosus].

A case is described of a 33-year old woman with systemic lupus erythematosus (SLE) in longterm treatment with corticosteroids who experienced spontaneous rupture of the left patellar tendon. A comparative study of 28 previously reported cases of SLE patients with spontaneous tendon rupture in weight bearing joints is performed. It is suggested that renal disease may be an etiological factor for spontaneous tendon rupture in patients with systemic lupus erythematosus.