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Necrotizing Fasciitis versus Pyomyositis: Discrimination with Using MR Imaging
Korean Journal of Radiology ; : 121-128, 2009.
Article Dans Anglais | WPRIM | ID: wpr-60040
ABSTRACT

OBJECTIVE:

We wanted to evaluate the MR findings for differentiating between necrotizing fasciitis (NF) and pyomyositis (PM). MATERIALS AND

METHODS:

The MR images of 19 patients with surgically confirmed NF (n = 11) and pathologically confirmed PM (n = 8) were retrospectively reviewed with regard to the presence or absence of any MRI finding criteria that could differentiate between them.

RESULTS:

The patients with NF had a significantly greater prevalence of the following MR findings (p < 0.05) a peripheral band-like hyperintense signal in muscles on fat-suppressed T2-weighted images (73% of the patients with NF vs. 0% of the patients with PM), peripheral band-like contrast enhancement (CE) of muscles (82% vs. 0%, respectively) and thin smooth enhancement of the deep fascia (82% vs. 13%, respectively). The patients with PM had a significantly greater prevalence of the following MRI findings (p < 0.05) a diffuse hyperintense signal in muscles on fat-suppressed T2-weighted images (27% of the patients with NF vs. 100% in the patients with PM), diffuse CE of muscles (18% vs. 100%, respectively), thick irregular enhancement of the deep fascia (0% vs. 75%, respectively) and intramuscular abscess (0% vs. 88%, respectively). For all patients with NF and PM, the superficial fascia and muscle showed hyperintense signals on T2-weighted images and CE was seen on fat-suppressed CE T1-weighted images. The subcutaneous tissue and deep fascia showed hyperintense signals on T2-weighted images and CE was seen in all the patients with NF and in seven (88%) of the eight patients with PM, respectively.

CONCLUSION:

MR imaging is helpful for differentiating between NF and PM.
Sujets)

Texte intégral: Disponible Indice: WPRIM (Pacifique occidental) Sujet Principal: Traitement d&apos;image par ordinateur / Imagerie par résonance magnétique / Études rétrospectives / Muscles squelettiques / Fasciite nécrosante / Diagnostic différentiel / Abcès / Pyomyosite / Fascia Type d'étude: Etude diagnostique / Étude observationnelle / Étude pronostique / Facteurs de risque Limites du sujet: Adolescent / Adulte / Adulte très âgé / Aged80 / Femelle / Humains / Mâle langue: Anglais Texte intégral: Korean Journal of Radiology Année: 2009 Type: Article

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Texte intégral: Disponible Indice: WPRIM (Pacifique occidental) Sujet Principal: Traitement d&apos;image par ordinateur / Imagerie par résonance magnétique / Études rétrospectives / Muscles squelettiques / Fasciite nécrosante / Diagnostic différentiel / Abcès / Pyomyosite / Fascia Type d'étude: Etude diagnostique / Étude observationnelle / Étude pronostique / Facteurs de risque Limites du sujet: Adolescent / Adulte / Adulte très âgé / Aged80 / Femelle / Humains / Mâle langue: Anglais Texte intégral: Korean Journal of Radiology Année: 2009 Type: Article