Fatty infiltration of the supraspinatus: A reliability study

Williams, M. D.; Lädermann, Alexandre; Mélis, Barbara; Barthélemy, R; Walch, Gilles

doi:10.1016/j.jse.2008.12.014

Cited by 91 publications

(70 citation statements)

References 10 publications

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“…Conversely, decreased demand leads to muscular hypotrophy and fatty infiltration [31]. Based on the postulated function of a hip stabilizer [29], we questioned if dysplastic hips have (1) increased anatomic dimensions (thickness, width, circumference, CSA, and partial volume), and (2) less fatty infiltration of the iliocapsularis muscle, compared with hips with excessive coverage.…”

Section: Discussionmentioning

confidence: 99%

The Iliocapsularis Muscle: An Important Stabilizer in the Dysplastic Hip

Babst

Steppacher

Ganz

et al. 2011

Clinical Orthopaedics &Amp; Related Research

111

155

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Background The iliocapsularis muscle is a little known muscle overlying the anterior hip capsule postulated to function as a stabilizer of dysplastic hips. Theoretically, this muscle would be hypertrophied in dysplastic hips and, conversely, atrophied in stable and well-constrained hips. However, these observations have not been confirmed and the true function of this muscle remains unknown. Questions/purposes We quantified the anatomic dimensions and degree of fatty infiltration of the iliocapsularis muscle and compared the results for 45 hips with deficient acetabular coverage (Group I) with 40 hips with excessive acetabular coverage (Group II). Patients and Methods We used MR arthrography to evaluate anatomic dimensions (thickness, width, circumference, cross-sectional area [CSA], and partial volume) and the amount of fatty infiltration.

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Section: Discussionmentioning

confidence: 99%

The Iliocapsularis Muscle: An Important Stabilizer in the Dysplastic Hip

Babst

Steppacher

Ganz

et al. 2011

Clinical Orthopaedics &Amp; Related Research

111

155

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“…This can be explained by the way muscle tissue reacts to a change in weight load: A muscle or portions of a muscle can undergo hypertrophy with increased weight loading [19,9]. Conversely, decreased weight loading is associated with muscle hypotrophy and fatty infiltration [20,11,21]. It is known that a different amount of traumatic injury occurs depending on the surgical approach that is chosen in patients with THA [10,22,23,7].…”

Section: Discussionmentioning

confidence: 99%

Abductor tendon tears are associated with hypertrophy of the tensor fasciae latae muscle

et al. 2012

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OBJECTIVE: To evaluate the association between hypertrophy of the tensor fasciae latae muscle and abductor tendon tears. MATERIALS AND METHODS: Thirty-five patients who underwent MRI of the abductor tendons of the hip were included in this retrospective study. A subgroup of 18 patients was examined bilaterally. The area of the tensor fasciae latae muscle and the area of the sartorius muscle (size reference) were quantified at the level of the femoral head, and a ratio was calculated. Two radiologists assessed the integrity of the gluteus medius and minimus tendon in consensus. Data were analyzed with a Mann-Whitney U test. RESULTS: Sixteen out of 35 patients (46 %) had a tear of the gluteus medius or minimus tendon. The ratio of the area of the tensor fasciae latae to the sartorius muscle was significantly higher (p = .028) in the group with an abductor tendon tear (median 2.25; Interquartile Range [IQR] = 1.97-3.21) compared to the group without any tears (median 1.91; IQR = 1.52-2.26). The bilateral subanalysis showed that in patients without a tear, the ratio of the two areas did not differ between each side (p = .966), with a median of 1.54 (primary side) and 1.76 (contralateral side). In patients with an abductor tendon tear the ratio was significantly higher (p = .031) on the side with a tear (median 2.81) compared to the contralateral healthy side (1.67). CONCLUSION: Patients with abductor tendon tears showed hypertrophy of the tensor fasciae latae muscle when compared to the contralateral healthy side and to patients without a tear. AbstractObjective. To evaluate the association between hypertrophy of the tensor fasciae latae muscle and abductor tendon tears. Materials and Methods.Thirty-five patients with MRI of the abductor tendons of the hip were included in this retrospective study. A subgroup of 18 patients was examined bilaterally. The area of the tensor fasciae latae muscle and the area of the sartorius muscle (size reference) were quantified at the level of the femoral head, and a ratio was calculated. Two radiologists assessed the integrity of the gluteus medius and minimus tendon in consensus. Data were analyzed with a Mann-Whitney U test.Results. Sixteen out of 35 patients (46%) had a tear of the gluteus medius or minimus tendon. The ratio of the area of the tensor fasciae latae to the sartorius muscle was significantly higher (p=.028) in the group with an abductor tendon tear (median 2.25;Interquartile Range [IQR]= 1.97-3.21) compared to the group without tear (median 1.91; IQR= 1.52-2.26). The bilateral subanalysis showed that in patients without a tear, the ratio of the two areas did not differ between each side (p=.966), with a median of 1.54 (primary side) and 1.76 (contralateral side). In patients with an abductor tendon tear the ratio was significantly higher (p=.031) on the side with a tear (median 2.81) compared to the contralateral healthy side (1.67). Conclusion.Patients with abductor tendon tears showed hypertrophy of the tensor fasciae latae muscle when compared to the ...

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“…The average of these two values defined the final stage of fatty infiltration for the infraspinatus and subscapularis muscles. For statistical evaluation we classified fatty infiltration as minimal for Goutallier stages 0 and 1, moderate for Goutallier Stage 2 and severe for Goutallier stages 3 and 4 [24]. One of us (BM) also measured muscular atrophy indirectly using the tangent sign on the most lateral cut of the sagittal plane where the spine appears in contact with the scapula on the MRI/CT as described by Zanetti [26] (Fig.…”

Section: Methodsmentioning

confidence: 99%

Natural History of Fatty Infiltration and Atrophy of the Supraspinatus Muscle in Rotator Cuff Tears

Mélis

DeFranco

Chuinard

et al. 2010

Clinical Orthopaedics &Amp; Related Research

Self Cite

214

153

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Background In some patients nonoperative treatment of a rotator cuff tear is sufficient, while in others it is only the first stage of treatment prior to surgery. Fatty infiltration progresses throughout the nonoperative treatment although it is not known at what point fatty infiltration contributes to poor functional outcomes, absence of healing, or increased rerupture rates. Questions/purposes We therefore identified factors related to the appearance of supraspinatus muscle fatty infiltration, determined the speed of appearance and progression of this phenomenon, and correlated fatty infiltration with muscular atrophy. Methods We retrospectively reviewed 1688 patients with rotator cuff tears and recorded the following: number of tendons torn, etiology of the tear, time between onset of shoulder symptoms and diagnosis of rotator cuff tear. Fatty infiltration of the supraspinatus was graded using either CT or MRI classification. Muscular atrophy was measured indirectly using the tangent sign. Results Moderate supraspinatus fatty infiltration appeared an average of 3 years after onset of symptoms and severe fatty infiltration at an average of 5 years after the onset of symptoms. A positive tangent sign appeared at an average of 4.5 years after the onset of symptoms. Conclusions Our results suggest that rotator cuff repair should be performed before the appearance of fatty infiltration (Stage 2) and atrophy (positive tangent sign)-especially when the tear involves multiple tendons.

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Fatty infiltration of the supraspinatus: A reliability study

Cited by 91 publications

References 10 publications

The Iliocapsularis Muscle: An Important Stabilizer in the Dysplastic Hip

The Iliocapsularis Muscle: An Important Stabilizer in the Dysplastic Hip

Abductor tendon tears are associated with hypertrophy of the tensor fasciae latae muscle

Natural History of Fatty Infiltration and Atrophy of the Supraspinatus Muscle in Rotator Cuff Tears

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