PMC9633569_01
PET-TC (June 2022). Focal pathological uptake of FDG at the level of the interatrial septum (black arrow).
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PET CT showed focal increased up- take corresponding to the regions of interatrial sept on CT (Fig. 1).
PET-CT (October 2009). The examination showed an avid peri-valvular uptake extended to the cardiac chambers (white arrowheads) but a focal pathological uptake of FDG at the level of the interatrial septum was already present (red arrow).
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The 2009 examination showed an avid uptake of the peri-valvular endocardium and the inner walls of the cardiac chambers to be related to the ongoing acute inflammatory process (Fig. 2).
CT (June 2022). Focal area of fat density corresponded to FDG uptake (black arrow).
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The massive uptake masked the already evident focal increased metabolic activity at the level of the interatrial septum, which corresponded on CT to a focal area of fat density with bilobed morphology (Fig. 3).