title: Superior dislocation of the patella: a case report.
abstract: BACKGROUND
  Superior dislocation of the patella is an uncommon condition that mainly occurs in knees with a high patella and medial femorotibial degenerative arthritis. There are no previous reports of this condition occurring in association with tibial valgus osteotomy.
  
  
  METHODS
  We report the case of a patient in whom vertical dislocation recurred twice at 4 months after tibial valgus osteotomy. To avert additional recurrence or new dislocations, the patient was treated surgically to remove the existing osteophytes.
  
  
  CONCLUSIONS
  An arthroscopic approach was decided because of the lower associated morbidity and good results with this technique compared to open surgery.
authors: Orthopedic and Trauma Surgery, Fundación García Cugat Hospital Quiron Barcelona - Spain. roberto6jas@gmail.com.
authors: Xavier
authors: X
authors: Cusco
authors: Roberto
authors: R
authors: Seijas
authors: Oscar
authors: O
authors: Ares
authors: Jose R
authors: JR
authors: Cugat
authors: Montserrat
authors: M
authors: Garcia-Balletbo
authors: Ramon
authors: R
authors: Cugat