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March 3, 2016Radiology

Predicting Retear after Repair of Full-Thickness Rotator Cuff Tear: Two-Point Dixon MR Imaging Quantification of Fatty Muscle Degeneration—Initial Experience with 1-year Follow-up

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Key result

~18% higher preoperative supraspinatus fat fraction is linked to failed versus intact repair.

  • P<.001
  • n=50

Why the study?

The relationship between preoperative fatty degeneration quantified by two-point Dixon MR imaging and postoperative retear after full-thickness supraspinatus tear repair was not established.

Does preoperative fatty degeneration quantified by two-point Dixon MR imaging predict postoperative retear in patients with full-thickness supraspinatus tears?

Comparison

Failed-repair group vs intact-repair group

Design

Prospective cohort study with MR imaging quantification

Follow-up

1 year

Authors

TNTaiki NozakiKeio UniversityATAtsushi TasakiSt. Luke's International HospitalSHSaya HoriuchiSt. Luke's International Hospital

Discussion

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Implication

Preoperative supraspinatus fat fraction may predict retear risk; leaves open whether Dixon MR should guide surgical decisions.

Study Design

Type

Cohort (n=50)

Structured PICO

Does preoperative fatty degeneration quantified by two-point Dixon MR imaging predict postoperative retear in patients with full-thickness supraspinatus tears?

P
Population
50 patients (mean age 67.0 years, 64% female) with full-thickness supraspinatus tears followed for 1 year postoperatively.
E
Exposure
Preoperative and postoperative 1-year follow-up MR imaging using a two-point Dixon sequence to quantify fatty degeneration
C
Comparator
Failed-repair group vs intact-repair group
O
Outcome
Degree of preoperative fatty degeneration, postoperative longitudinal changes, and differences between patients who do and do not experience a retearsurrogate

Main Result

Absolute Event Rate: 37% vs 19.5%

p-value: p=< .001

MR imaging quantification of preoperative fat fractions using a two-point Dixon sequence may predict postoperative retear in patients with full-thickness rotator cuff tears.

Cite This Study

Nozaki et al. (2016) conducted a cohort in Full-thickness supraspinatus tears (n=50). Failed repair (retear) vs. Intact repair was evaluated on Preoperative fat fraction in the supraspinatus muscle (p=< .001). Preoperative fat fractions in the supraspinatus muscle were significantly higher in patients with a failed repair compared to those with an intact repair (37.0% vs 19.5%, P<.001).

synapsesocial.com/papers/6aacc00a80213d0f61ecbdd5https://doi.org/10.1148/radiol.2016151789
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Surgically Repaired Massive Rotator Cuff Tears: MRI of Tendon Integrity, Muscle Fatty Degeneration, and Muscle Atrophy Correlated with Intraoperative and Clinical Findings2005 · 231 citations
  2. 2Quantifying rotator cuff atrophy and fatty degeneration at the supraspinatus origin in the scapular fossa2014 · 20 citations
  3. 3Management of Disorders of the Rotator Cuff: Proceedings of the ISAKOS Upper Extremity Committee Consensus Meeting2013 · 51 citations
  4. 4Natural History of Fatty Infiltration and Atrophy of the Supraspinatus Muscle in Rotator Cuff Tears2010 · 252 citations
  5. 5Magnetic Resonance Imaging for Supraspinatus Muscle Atrophy After Cuff Repair2002 · 76 citations