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Titolo:
MR-IMAGING IN CHRONIC ACHILLES-TENDON DISORDER
Autore:
MOVIN T; KRISTOFFERSENWIBERG M; ROLF C; ASPELIN P;
Indirizzi:
HUDDINGE UNIV HOSP,KAROLINSKA INST,DEPT ORTHOPAED SURG,SECT SPORTS MED S-14186 HUDDINGE SWEDEN HUDDINGE UNIV HOSP,KAROLINSKA INST,DEPT DIAGNOST RADIOL S-14186 HUDDINGE SWEDEN
Titolo Testata:
Acta radiologica
fascicolo: 2, volume: 39, anno: 1998,
pagine: 126 - 132
SICI:
0284-1851(1998)39:2<126:MICAD>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
MAGNETIC-RESONANCE; ULTRASONOGRAPHY; TENDINITIS; INJURIES; FEATURES;
Keywords:
ACHILLES TENDON, HISTOPATHOLOGY; MR IMAGING, GADOLINIUM;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
26
Recensione:
Indirizzi per estratti:
Citazione:
T. Movin et al., "MR-IMAGING IN CHRONIC ACHILLES-TENDON DISORDER", Acta radiologica, 39(2), 1998, pp. 126-132

Abstract

Objectives: The primary objective was to compare 4 imaging sequences (T1-weighted, T2-weighted, proton density, and T1-weighted with gadolinium contrast agent enhancement) with regard to intratendinous signal abnormality in patients with achillodynia. The secondary objective wasto relate the images to the clinical symptoms and histopathological findings. Material and Methods: Twenty patients (16 men, 4 women, median age 40 years) with chronic achillodynia participated in the study. The symptoms prohibited activity and clinical examination revealed swelling and tenderness 1.5-6 cm proximal to the Achilles tendon insertion. Of the 20 patients: 5 had bilateral achillodynia, 4 had had previouscontralateral Achilles tendon disorder, and 11 had never had symptomsin the contralateral tendon region. These 11 tendons served as controls for comparison. MR imaging was performed on a superconductive 1.5 Tunit. Both Achilles tendons were examined (n=40) at the same time, and multiple sagittal and transversal images were obtained. The corresponding sections on these images were visually graded according to both extension and level of MR signal intensity. Tissue was obtained for microscopic examination from the most symptomatic side in all patients (n=20). Results: Tl-weighted images following gadolinium contrast medium enhancement proved to be the best method by which to visualize intratendinous signal abnormality. This sequence revealed signal abnormality in 24/25 symptomatic tendons and in 1/11 control tendons (p<0.001). Histopathological examination showed an increased noncollagenous extracellular matrix and altered fiber structure in the lesions corresponding to the contrast-enhanced areas. Conclusion: Gadolinium enhancement improved the imaging of intratendinous signal abnormality on T1-weighted images. There was a high level of extracellular glycosaminoglycans,which are highly-fixed negatively-charged macromolecules with extremewater-retaining capacity and which may have contributed to the enhancement by the gadolinium contrast agent.

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Documento generato il 25/11/20 alle ore 15:24:10