Variability in the Spectrum of Reporting on the Schenck KD I Classification in the Orthopaedic Literature: A Systematic Review and Meta-analysis.

The number of true, clinically and/or radiographically confirmed unicruciate KDs was extremely rare, representing <1% of all reported Schenck KD I injuries. A misappropriation of these injury patterns as true KDs may be taking place, affecting outcome studies and potentially biasing published clinical results. An MLKI classification system must document whether a confirmed KD has occurred.