title: Heterotopic ossification after patellar tendon repair in a man with trisomy 8 mosaicism: a case report and literature review.
abstract: BACKGROUND
  Heterotopic ossification is the abnormal formation of lamellar bone in soft tissue. Its presence jeopardizes functional outcome, impairs rehabilitation and increases costs due to subsequent surgical interventions.
  
  
  METHODS
  We present a case of a 32-year-old African-American man with trisomy 8 mosaicism who developed severe heterotopic ossification of his right extensor mechanism subsequent to repair of a patellar tendon rupture.
  
  
  CONCLUSIONS
  To the best of our knowledge there are no prior reports of heterotopic ossification as a complication of patellar tendon repair. This case may suggest an association between trisomy 8 mosaicism and increased risk of heterotopic ossification.
authors.affiliation: Department of Orthopedic Surgery, University of Illinois at Chicago, 835 S Wolcott Avenue, M/C 844 Chicago, IL 60612, USA. achen9@uic.edu.
authors.forename: Austin
authors.initials: A
authors.lastname: Chen
authors.forename: Samuel
authors.initials: S
authors.lastname: Chmell