Estudo comparativo entre artrotomografia computadorizada "multislice" e artrorressonância magnética na instabilidade do ombro correlacionadas com os achados artroscópicos / A comparative study of anterior shoulder instability by multislice computerized arthrotomography and magnetic resonance arthrography in correlation with arthroscopic findings

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

Shoulder instability is characterized by the incapacity to keep the humeral head centered within the glenoid fossa. Clinical diagnosis should include a history of prior events, a complete physical examination, and a set of objective tests to evaluate the presence and extent of shoulder instability. This study aims to compare the imaging of anatomical deformities seen in shoulder instability by employing both multislice computerized tomography (MSCT) arthrography and magnetic resonance arthrography (MRA). A correlation between those images and the arthroscopic findings was important to determining the efficacy of MSCT arthrography in the assessment of shoulder instability. The 30 patients in this prospective study, who had had a previous clinical diagnosis of shoulder instability, underwent CT arthrography using 0.5 mm-thick slices with reconstructions every 3 mm, and T1- and T2-weighted sequential MR imaging arthrography with and without fat saturation. MRA was shown to be 93.33 % sensitive in detecting superior labral lesion, 96.30% in anterior labral lesion, and 83.3% sensitive in anterosuperior labral lesion, whereas the respective results for MSCT arthrography were 90%, 88.89%, and 77.78%. MRA and MSCT arthrography afforded 16.67% and 33.30% sensitivity for joint cartilage injury, respectively. Both techniques were equally sensitive in detecting Hill-Sachs lesion (100%), anteroinferior labral lesion (100%), capsular abnormalities (88.89%), and bony Bankart lesions (80%). The results herein led us to conclude that MRA is more accurate than MSCT arthrography in assessing anterosuperior, superior (SLAP) and anterior labral lesions and the MSCT arthrography had good results in the evaluation of the structures related to shoulder instability. Both methods yielded equivalent results for Hill-Sachs, ALPSA and Bankart lesions. The MSCT arthrography furnished better results than MRA in the diagnosis of articular cartilage lesions

ASSUNTO(S)

ombro shoulder diagnóstico joint instability artroscopy instabilidade articular artroscopia diagnosis

ACESSO AO ARTIGO

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