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J Orthop Traumatol. 2008 Sep;9(3):159-62. doi: 10.1007/s10195-008-0002-x. Epub 2008 May 1.

Simultaneous chronic rupture of quadriceps tendon and contra-lateral patellar tendon in a patient affected by tertiary hyperparatiroidism.

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1
Dipartimento delle Chirurgie Speciali, Unità Operativa di Ortopedia e Traumatologia, Università degli Studi di Palermo, Azienda Ospedaliera Universitaria Policlinico "P. Giaccone", Via del Vespro, 90127, Palermo, Italy.

Abstract

Spontaneous ruptures of the extensor mechanism of the knee are very rare. They tend to increase considerably in patients with metabolic diseases such as chronic renal failure, hyperparathyroidism, diabetes, gout, and systemic lupus erythematosus. The reported case regards a 48-year-old man with chronic, spontaneous and simultaneous quadriceps, and contra-lateral patellar tendon rupture. The patient suffered from chronic renal failure and for the past year from tertiary hyperparathyroidism. Ruptured tendons were repaired and both knee were evaluated monthly for the next 12 months. Good functional recovery was achieved on both knees without relapse. This case emphasizes the importance of long-term high parathyroid hormone level in the etiology of tendons ruptures.

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