[Acute bilateral lesion of the patellar tendon associated to diabetes mellitus. Case report].

The bilateral patellar tendon tear is very infrequent. Various pathological conditions may affect the extensor mechanism including kidney disease, diabetes mellitus, hyperparathyroidism, rheumatoid arthritis, systemic lupus erythematosus, osteomalacia, infection, obesity, corticosteroid therapy and even osteogenesis imperfect. We present the case of a 43-year-old male with a history of type-2 diabetes mellitus, systemic hypertension and exogenous obesity, who sustained a bilateral patellar tendon tear. He received surgical and medical treatment and was followed-up for one year, with satisfactory functional outcomes.