ESSR 2019 / P-0129
Postoperative, traction MR arthrography for pain after arthroscopy for FAI: High prevalence of osseous deformities and intra-articular lesions due to under-/overcorrection
Congress: ESSR 2019
Poster No.: P-0129
Type: Scientific Poster
Keywords: Arthrography, MR, Musculoskeletal joint, Arthritides
Authors: F. Schmaranzer1, T. D. Lerch1, B. Henninger2, K. A. Siebenrock1, M. Tannast1, E. Schmaranzer3; 1Bern/CH, 2Innsbruck/AT, 3St.Johann /Tirol/AT

Methods and Materials

IRB-approved, retrospective study. Between 2010-17, 806 patients underwent arthroscopic FAI correction and/or labrum surgery. Database was reviewed for symptomatic patients with complete radiographs and traction MR arthrography (MRA) of the hip (1.5 T) obtained before and after hip arthroscopy according to the routine protocol. 49 patients were included: mean age 29 ± 10 years, 67% female. Traction was applied using a MR-compatible traction device with weight-adaption Fig. 1 . One reader assessed pre- and postoperative images. (1) Acetabular coverage (LCE<25° = dysplasia, LCE>39° = pincer deformity) and Tönnis osteoarthritis (OA) grade were assessed on AP pelvic views. Cam deformity was defined (α>60°) on radial MR images. Femoral torsion measurements were only available for postoperative MRI (low/high torsion: <5°/>30°). (2) Presence of residual tears-, retears of the labrum, capsular adhesions/defects was assessed on traction MRA. (3) OA progression on traction MRA was defined as new acetabular/femoral cartilage lesions and osteophytes formation.

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