Fig. 2From: The value of 18F-FDG PET/CT in the systemic evaluation of patients with Rosai–Dorfman disease: a retrospective study and literature reviewInvolved organs and the lesions additionally detected by 18F-FDG PET/CT. Black bars: total number of cases with the sites involved, determined by a combination of imaging and clinical manifestations. Gray bars: the number of involvements additionally detected by 18F-FDG PET/CTBack to article page