Spontaneous tendinous breakage is a rare complication in patients with systemic erythematous lupus. Bilateral tendinous breakage is an exceptional phenomena. Two cases of bilateral spontaneous breakage are discussed, one achillea, the other patellar, its frequency is compared in the scientific literature with the one found in the patients at our center. Magnetic Resonance usefulness is underlined to confirm the diagnosis of tendinous breakage.