Abstract

OBJETIVO: Descrever os achados em artro RM de sujeitos com suspeita de lesão do labrum acetabular. MÉTODO: Foram analisadas 108 artro RM de quadris em 2007/2008. Dois radiologistas independentemente analisaram as imagens e foi considerada a resposta comum entre eles. Com base em seus pareceres observou-se o local e estadiamento das lesões labrais e condrais, as alterações anatômicas, e a presença de tendinite e bursite trocantérica. RESULTADO: As lesões labrais grau I ocorreram em 41% dos casos, grau II em 31%, e grau III em 29%. O IFA tipo cam foi frequente em 36% dos casos, tipo pincer em 11%, e IFA misto em 13%, nestes casos 57% apresentaram lesão labral grau III, A lesão condral grau I foi observada em 51% acetábulos, as de grau II em 13%, e grau III em 18%. CONCLUSÃO: As alterações morfológicas que provocam IFA do tipo cam foram as mais prevalentes. Em relação ao grau de lesão labral e condral foram predominantes as lesões grau I independente da presença ou do tipo de IFA, exceto em IFAs mistos onde houve predomínio de lesão labral grau III. Não foi observada uma relação entre o grau de lesão labral e condral.

Highlights

  • The acetabular labrum is a fibrocartilaginous structure fixed to the acetabular rim that plays an important role in hip stability.The labrum is responsible for increasing articular congruity and improving the distribution of loads between the femoral head and the acetabulum.[1,2]Labral tears are causes of incapacitating chronic pain, of an insidious kind, and generally of microtraumatic nature associated with structural abnormalities of the hip.[1]

  • No relationship was observed between the degree of labral and chondral lesion

  • Of the 108 hips analyzed it was observed that in 42 (39%) hips there were no signs of any kind of anatomical alteration such as dysplasia and femoroacetabular impingement (FAI)

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Summary

Introduction

The acetabular labrum is a fibrocartilaginous structure fixed to the acetabular rim that plays an important role in hip stability.The labrum is responsible for increasing articular congruity and improving the distribution of loads between the femoral head and the acetabulum.[1,2]Labral tears are causes of incapacitating chronic pain, of an insidious kind, and generally of microtraumatic nature associated with structural abnormalities of the hip.[1]. Alterations in the anatomical relationship between femur and acetabulum are the main etiological factors for the labral tear as they provoke femoroacetabular impingement (FAI). This impingement can be of the cam type, where there is loss of normal spherical junction between the femoral head and neck,[1,6,7,8] or of the pincer type brought about by the enlargement of acetabular cover resulting from deep acetabulum (coxa profunda) or acetabular retroversion.[7,8] Less frequent, hip dysplasia provokes instability and excessive anterosuperior displacement of the femur, which generates chronic trauma on the labrum, causing its degeneration.[1,9]

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