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Abstract #2243

Predicting re-tear after repair of full-thickness rotator cuff tear: 2-Point Dixon MR quantification of fatty muscle degeneration – Initial experience with 1-year follow-up

Taiki Nozaki1, Atsushi Tasaki2, Saya Horiuchi1, Junko Ochi1, Jay Starkey1, Takeshi Hara3, Yukihisa Saida1, Yasuyuki Kurihara1, and Hiroshi Yoshioka4

1Radiology, St.Luke's International Hospital, Tokyo, Japan, 2Orthopaedic Surgery, St.Luke's International Hospital, Tokyo, Japan, 3Intelligent Image Information, Gifu University, Gifu, Japan, 4Radiological Sciences, University of California, Irvine, Orange, CA, United States

Rotator cuff tear is a common cause of shoulder pain and disability. Minimally-invasive arthroscopic rotator cuff repair is increasingly popular for treatment of full-thickness rotator cuff tear. However, operative outcomes are far from perfect. Postoperative re-tears are associated with greater fatty degeneration. The purpose of this study was to quantify the pre- and post-operative muscular fatty degeneration using a 2-Point Dixon sequence in patients with rotator cuff tears treated by arthroscopic rotator cuff repair. Further, we aim to assess the relationship of preoperative fat fraction values within rotator cuff muscles between patients who experience re-tear and those who do not.

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