[The posterior malleolus or Volkmann's triangle: coming to terms with the past].

Having observed Nelsons and Jensen's rule for the fixation of the posterior malleolus in ankle fractures for over 70 years recent studies have shown that this dogma might have its limitations. Today no one can determine with absolute conviction what to do with this controversial fragment. To fix it operatively means to follow some strict surgical procedures (e.g. anatomy, approach and placement of implants). These guidelines are presented, the indications for fixation are discussed and the prognosis for these difficult fractures is outlined.