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Patellar tendon rupture with underlying systemic disease.

R Kricun, M E Kricun, G A Arangio

AJR. American Journal of Roentgenology

|October 1, 1980

Summary

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Systemic diseases like lupus and kidney failure increase the risk of spontaneous patellar tendon ruptures. These ruptures often affect both legs and can occur within the main tendon substance, not just the insertion point.

Area of Science:

Orthopedics
Rheumatology
Nephrology

Background:

Systemic diseases are increasingly recognized as risk factors for tendon pathology.
Patellar tendon rupture is a debilitating injury, often associated with overuse or trauma.

Observation:

Two cases of patellar tendon rupture in patients with systemic lupus erythematosus and chronic renal failure with secondary hyperparathyroidism are presented.
A literature review identified 13 additional cases of patellar tendon rupture in patients with systemic disease.

Findings:

Spontaneous patellar tendon rupture occurred in over half of the reviewed cases.
An 87% association was found between patellar tendon rupture and contralateral extensor tendon mechanism rupture.
Rarely, tears may involve the main substance of the patellar tendon, not just the insertion.

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Implications:

Systemic disease significantly elevates the risk of patellar tendon rupture.
Clinicians should consider underlying systemic conditions in patients presenting with patellar tendon injuries.
Early recognition and management are crucial for optimizing outcomes in these complex cases.