PMC7575797_01
Computed tomography images Computed. tomography shows mixed-dense consolidations that include fat density in the middle and lower lobes.
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The CT revealed mixed-dense consolidation in the middle and right lower lobes with a fat density of less than -30 Hounsfield units (Fig. 1A-D).
Positron emission tomography images The. positron emission tomography scan shows spotty accumulation of 18F-fluorodeoxyglucose in the matched low density area on computed tomography (arrow marks).
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On PET, the FDG uptake was distributed in spots in the consolidation of both lobes (standardized uptake value (SUV): 5.7) (Fig. 2). Areas of high FDG uptake partly matched with the fat-density areas on corresponding CT (Fig. 2, arrow marks).
Pathological examination of a lung biopsy specimen Aggregation. of lipid deposition is observed as rounded, empty vacuoles stained with hematoxylin and eosin (asterisk marks). Small lipid droplets are phagocytosed by alveolar macrophages (arrow marks).
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Pathological examination of hematoxylin and eosin-stained sections revealed aggregation of rounded, empty vacuoles corresponding to lipid deposition (Fig. 3, asterisk marks). Small lipid droplets were phagocytosed by alveolar macrophages (Fig. 3, arrow marks), which are characteristic findings of lipoid pneumonia.