title: Subchondral Impaction Fractures of the Medial Femoral Condyle in Weightlifters: A Report of 5 Cases.
abstract: Although subchondral impaction fractures have already been reported in the non-weight-bearing portion of the lateral femoral condyle, this study reveals the presence of an intra-articular impaction fracture of the postero-superior region of the non-weight-bearing portion of the medial femoral condyle recognized in 5 of a group of 22 representatives of the Polish national Olympic weightlifting team, who underwent 1.5T magnetic resonance imaging examination. Articular cartilage lesions varied with regard to the type of injury and its severity ranging from healed or subchronic injuries to acute trauma. All described individuals had no clinical history of acute knee trauma and only 3 of them had minor pain symptoms. The accumulation of microtraumas occurring during participation in particular activities associated with weightlifting training seems to be responsible for the development of this type of contusion. This is the first description of impaction fracture observed in this location in professional weightlifters.
authors.affiliation: *Department of Radiology and Diagnostic Imaging, Medical University of Lodz, Lodz, Poland; †Medical Magnus Clinic, Lodz, Poland; and ‡Department of Orthopedics, Medical University of Lodz, Lodz, Poland.
authors.forename: Piotr
authors.initials: P
authors.lastname: Grzelak
authors.forename: Michał Tomasz
authors.initials: MT
authors.lastname: Podgórski
authors.forename: Ludomir
authors.initials: L
authors.lastname: Stefańczyk
authors.forename: Marek
authors.initials: M
authors.lastname: Krochmalski
authors.forename: Marcin
authors.initials: M
authors.lastname: Domżalski
mesh_terms: D000328:Adult; D012090:Cumulative Trauma Disorders / Q000175:diagnosis*; D004838:Epiphyses / Q000293:injuries; D005260:Female; D005264:Femoral Fractures / Q000175:diagnosis* / Q000209:etiology; D006801:Humans; D057072:Intra-Articular Fractures / Q000175:diagnosis* / Q000209:etiology; D007719:Knee Joint; D008279:Magnetic Resonance Imaging; D008297:Male; D014891:Weight Lifting / Q000293:injuries*; D055815:Young Adult