25dkou401
10.3205/25dkou401
urn:nbn:de:0183-25dkou4011
Meeting Abstract
Preoperative MRI assessment of intra-articular scar tissue and its impact on clinical outcomes in knee arthrofibrosis patients undergoing arthroscopic arthrolysis
Kylies
Kylies
Julian
J
University Medical Center Hamburg-Eppendorf, Hamburg, Deutschland
author
Arras
Arras
Christian
C
University Medical Center Hamburg-Eppendorf, Hamburg, Deutschland
author
Berninger
Berninger
Markus T.
MT
University Medical Center Hamburg-Eppendorf, Hamburg, Deutschland
author
Frings
Frings
Jannik
J
University Medical Center Hamburg-Eppendorf, Hamburg, Deutschland
author
Fahlbusch
Fahlbusch
Hendrik
H
University Medical Center Hamburg-Eppendorf, Hamburg, Deutschland
author
Vetter
Vetter
Birk
B
University Medical Center Hamburg-Eppendorf, Hamburg, Deutschland
author
Dust
Dust
Tobias
T
University Medical Center Hamburg-Eppendorf, Hamburg, Deutschland
author
Frosch
Frosch
Karl-Heinz
KH
University Medical Center Hamburg-Eppendorf, Hamburg, Deutschland
BG Clinic Hamburg, Hamburg, Deutschland
author
Korthaus
Korthaus
Alexander
A
University Medical Center Hamburg-Eppendorf, Hamburg, Deutschland
author
Krause
Krause
Matthias
M
University Medical Center Hamburg-Eppendorf, Hamburg, Deutschland
author
German Medical Science GMS Publishing House
Düsseldorf
610
20251031
engl
This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 License.
Dieser Artikel ist ein Open-Access-Artikel und steht unter den Lizenzbedingungen der Creative Commons Attribution 4.0 License (Namensnennung).
M0634
401
Deutsche Gesellschaft für Orthopädie und Unfallchirurgie
Deutsche Gesellschaft für Orthopädie und Orthopädische Chirurgie
Deutsche Gesellschaft für Unfallchirurgie
Berufsverband für Orthopädie und Unfallchirurgie
Deutscher Kongress für Orthopädie und Unfallchirurgie (DKOU 2025)
Abstracts | ASK Knie
Berlin
20251028
20251031
AB62-4203
TextObjectives and questions: Knee stiffness up to its maximum form of arthrofibrosis is a risk after knee surgery that is related to intra-articular fibrotic tissue. This study investigated the ability of MRI to detect and quantify fibrotic tissue and explored its association with clinical outcomes after arthroscopic arthrolysis.Material and methods: A retrospective analysis of 31 patients was conducted, categorizing cases as non-arthrofibrosis (nAFoK) or arthrofibrosis of the knee (AFoK) based on established criteria: (1) significant ROM loss, (2) stiffness persisting beyond three months post-procedure, (3) absence of mechanical blockade or infection, and (4) insufficient ROM improvement despite intensive physiotherapy. Patients meeting all criteria were classified as AFoK; those with knee fibrosis who did not were classified as nAFoK. Preoperative MRIs were used to measure fibrotic tissue thickness (TT) in six knee compartments. Functional outcomes were evaluated using the International Knee Documentation Committee (IKDC) score, and the impact of preoperative measured TT on postoperative outcomes was analyzed.Results: A total of 31 patients were included in the study, with 10 meeting the criteria for AFoK and 21 classified as nAFoK. Fibrous TT was significantly greater in AFoK patients compared to nAFoK, particularly in the suprapatellar recess and anterior knee compartments (p < 0.001). Patients with preoperative flexion deficits (<100°) demonstrated significantly increased TT in multiple knee compartments (p < 0.001), which correlated with reduced postoperative International Knee Documentation Committee (IKDC) scores. Similarly, patients with both flexion and extension deficits exhibited higher TT across all knee compartments and significantly worse functional outcomes (p < 0.0001). A threshold TT of 4.4–6.1 mm was identified as predictive of postoperative functional limitations, with thicker tissue associated with lower IKDC scores in most knee compartments.Discussion and conclusions: MRI effectively detects and quantifies fibrotic tissue, predicts functional outcomes, and supports surgical planning for arthrolysis. Threshold TT values (4.4–6.1 mm) could guide treatment. Further research is needed to confirm these findings.
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