title: [Fracture due to bilateral avulsion of the tuberosity of the shin bone (tibia). A case report].
abstract: BACKGROUND
  The avultion-fracture of the tibial tuberosity is a rare injury, one which appears in adolescents, predominantly male and happens in a zone in which the conditions of bone immaturity are favorable, so that an abrupt traction of the patellar tendon generates the injury. The reports of simultaneous fractures in both knees are rare.
  
  
  METHODS
  A 14-year-old masculine patient, who had suffered indirect trauma in both knees while playing soccer. The injuries correspond to a 3-A and one 3-B of Ogden's classification for the right and left knee respectively. Both injuries were treated in the same surgical act using screws and wire. The recovery of the patient was satisfactory.
  
  
  CONCLUSIONS
  The avultion-fracture of the tibial tuberosity is a rare injury. The bilateral presentation in simultaneous form is even rarer. Generally they are injuries of type 3 that require surgical handling. Preexisting conditions such as Osgood-Schlatter disease and the type of athletic training must be considered.
authors.affiliation: Hospital Regional No. 1 Ignacio García Téllez, Mérida, Yucatán. arredondo61@prodigy.net.mx
authors.forename: Edgardo
authors.initials: E
authors.lastname: Arredondo-Gómez
authors.forename: José Dolores
authors.initials: JD
authors.lastname: López Hernández
authors.forename: Fernando
authors.initials: F
authors.lastname: Chávez Martínez
mesh_terms: D000293:Adolescent; D001863:Bone Screws; D005593:Fracture Fixation, Internal; D005596:Fractures, Closed / Q000209:etiology / Q000601:surgery*; D018460:Fractures, Comminuted / Q000209:etiology / Q000601:surgery*; D006801:Humans; D007718:Knee Injuries / Q000601:surgery*; D008297:Male; D012916:Soccer / Q000293:injuries*; D013978:Tibial Fractures / Q000453:epidemiology / Q000209:etiology / Q000601:surgery*