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We read with interest the article by Schönau et al,1 a rare prospective study performed in the setting of fever/inflammation of unknown origin (FUO/IUO). They concluded that positron emitted tomography (PET)/CT is helpful in the diagnosis of the underlying cause of fever/inflammation not elucidated with a preliminary diagnostic work-up. Notwithstanding the merits of the study, there are aspects that may deserve additional comments.
To fulfil the concept of FUO/IUO, the patient has to have a condition whose diagnosis is …
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