Hypermetabolic Unicentric Castleman Disease of Kidney on FDG PET/CT

ABSTRACT A 62-year-old man presented with a huge lesion of left kidney on ultrasound in a health examination 1 month ago. The mass showed hypervascularity on enhanced CT and intense FDG uptake on FDG PET/CT in the lower pole of kidney, which suggested renal malignancy. The histopathological result after surgical resection of the mass confirmed the diagnosis of Castleman disease, the hyaline vascular variant.