Laxity and rupture of the patellar tendon in systemic lupus erythematosus. Association with secondary hyperparathyroidism

Babini, S.M.; Arturi, A.; Marcos, J.C.; Babini, J.C.; Iniguez, A.M.; Morteo, O.G.; Babini, S.M; Arturi, A; Marcos, J.C; Babini, J.C; Iniguez, A.M; Morteo, O.G

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Laxity and rupture of the patellar tendon in systemic lupus erythematosus. Association with secondary hyperparathyroidism

Babini, S.M.; Arturi, A.; Marcos, J.C.; Babini, J.C.; Iniguez, A.M.; Morteo, O.G.

Journal of Rheumatology 15(7): 1162-1165

1988

ISSN/ISBN: 0315-162X

PMID: 3172117

Document Number: 314664

We describe a patient with systemic lupus erythematosus, chronic renal failure and secondary hyperparathyroidism who developed laxity and elongation of the patellar tendon, followed by its rupture one year later. Hydroxyapatite and urate crystals were identified from the chalky material surrounding the patellar tendon observed at surgery. These findings suggest that tendon laxity and elongation could possibly be detected before its rupture and that secondary hyperparathyroidism could be considered as another causative factor of tendon damage in patients with systemic lupus erythematosus.