Abstract:
:Of 293 patients who underwent computed tomography (CT), surgery, and pathologic examination for chronic sinusitis, 25 had a diagnosis of fungal sinusitis at pathologic examination. Of these, 22 had foci of increased attenuation at CT (in four patients the mean representative CT number [Hounsfied unit] was 122.2 HU [SD, 8.2 HU]), and three did not. Of the 22, 19 patients (76%) met the CT criterion of this study (there was a 12% false-positive and a 12% false-negative diagnostic rate). Six of the 19 patients and one additional patient underwent magnetic resonance (MR) imaging, and all demonstrated remarkably hypointense signal characteristics on T2-weighted images. The findings at MR imaging therefore appear more characteristic of fungal sinusitis than the findings at CT. Furnace atomic absorption spectrometry showed increased concentrations of iron and manganese in mycetoma compared with their concentrations in bacterially infected mucus. This finding and the presence of calcium in the fungal concretion may explain the hypointense T2-weighted signal on MR images.
journal_name
Radiologyjournal_title
Radiologyauthors
Zinreich SJ,Kennedy DW,Malat J,Curtin HD,Epstein JI,Huff LC,Kumar AJ,Johns ME,Rosenbaum AEdoi
10.1148/radiology.169.2.3174990subject
Has Abstractpub_date
1988-11-01 00:00:00pages
439-44issue
2eissn
0033-8419issn
1527-1315journal_volume
169pub_type
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