MR Findings of Fungus Ball: Significance of High Signal Intensity on T1-Weighted Images.
J Korean Med Sci
; 35(3): e22, 2020 Jan 20.
Article
em En
| MEDLINE
| ID: mdl-31950777
ABSTRACT
BACKGROUND:
Central dark-signal intensity with high-signal, hypertrophic mucosal wall of paranasal sinuses on T2-weighted images (T2WI) is a characteristic magnetic resonance imaging (MRI) feature of sinonasal fungus ball. However, this finding is usually interpreted as non-fungal chronic sinusitis with central normal sinus air. In addition, T1-weighted images (T1WI) and T2WI are basic sequences of all magnetic resonance (MR) examinations. Therefore, we evaluated the usefulness of T1WI for detecting fungus balls comparing with computed tomography (CT) findings and T2-weighted MRI findings.METHODS:
This retrospective study was approved by the Institutional Review Board of Korea University Guro Hospital. Two reviewers assessed preoperative CT and MR images of 55 patients with pathologically confirmed fungus balls. Reviewers evaluated the presence and patterns of calcifications on CT. Overall signals and the presence and extent of certain signals of fungus balls on MRI were also assessed. The relationship between calcifications and MRI signals was also evaluated.RESULTS:
Of the patients, 89.1% had calcifications on CT. All had dark signal portions with high signal, hypertrophic mucosal walls on T2WI. Most (92.7%) patients showed iso- to hyper-intense overall signals on T1WI and 89.1% had T1-weighted high signal portions on MRI. The presence, patterns, and location of calcifications had no significant correlation with T1-weighted high-signal intensity portion.CONCLUSION:
Fungus ball can be suggested by the presence of the hyper-signal intensity portions in the fungal mass on T1WI in conjunction with dark-signal lesions surrounded by high-signal, hypertrophic mucosal walls in paranasal sinuses on T2WI.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Contexto em Saúde:
3_ND
Problema de saúde:
3_leprosy
Assunto principal:
Sinusite
/
Imageamento por Ressonância Magnética
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Tomografia Computadorizada por Raios X
/
Micoses
Tipo de estudo:
Diagnostic_studies
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Observational_studies
Limite:
Aged
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Aged80
/
Female
/
Humans
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Male
/
Middle aged
Idioma:
En
Revista:
J Korean Med Sci
Assunto da revista:
MEDICINA
Ano de publicação:
2020
Tipo de documento:
Article