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Bilateral multipartite patellae avulsions associated with a unilateral quadriceps tendon rupture
  1. Rebecca Miles,
  2. Christian Cruz and
  3. Brian J Mannino
  1. Orthopaedic Surgery, Tripler Army Medical Center, Honolulu, Hawaii, USA
  1. Correspondence to Rebecca Miles; becca.miles{at}


Multipartite (or bipartite) patella is a developmental anomaly that occurs in 2%–6% of individuals. In 50%, the variant is bilateral. Multipartite patella is usually an asymptomatic condition. Quadriceps tendon rupture is also a rare entity occurring mostly in men aged >40 years and usually results from an acute eccentric quadriceps contracture. The authors present a case of a patient with bilateral multipartite patellae that sustained bilateral multipartite avulsions as well as an associated unilateral quadriceps tendon rupture. This constellation of injuries has never been reported in the literature. The patient was treated with excision of the multipartite patella fragments and quadriceps tendon repair on the side with the extensor mechanism disruption. He was treated non-operatively for the contralateral lower extremity multipartite patella avulsion. This report, along with a thorough review of the literature, serves to demonstrate the clinical and radiographic characteristics of this unusual injury.

  • orthopaedics
  • knee injuries
  • tendon rupture
  • orthopaedic and trauma surgery

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  • Contributors RM, CC and BJM contributed to the writing of the manuscript.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Case reports provide a valuable learning resource for the scientific community and can indicate areas of interest for future research. They should not be used in isolation to guide treatment choices or public health policy.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.