DOI: 10.1097/rlu.0000000000006711 ISSN: 0363-9762
FDG PET/CT in IgG4-related Disease Involving the Urethra
Xiaojun Man, Changming Dong, Aisheng Dong, Xiandong SongUrethral involvement in IgG4-related disease is rare. We describe FDG PET/CT and delayed pelvic PET/MRI findings in a woman with IgG4-related disease presenting as urethral wall thickening with obstructive urinary symptoms. FDG PET/CT and delayed pelvic PET/MRI showed significant circumferential thickening of the urethral wall with intense diffuse activity (SUV max , 13) and multiple hypermetabolic lymph nodes in pelvic, retroperitoneal, mediastinal, pulmonary hilar, and axillary regions. This case indicates that IgG4-related urethral disease should be included in the differential diagnosis of FDG-avid urethral or periurethral lesions.