A 59-year-old man presented with fever and lower extremity myalgia. Laboratory studies revealed elevated C-reactive protein. 18F-FDG PET/CT demonstrated FDG uptake not only in the brachial arteries, femoral arteries, and their main ramifications, which were equivalent to small- to medium-sized arteries but also in the kidneys. Angiography revealed a renal aneurysm, confirming the diagnosis of polyarteritis nodosa. The increased FDG uptake in the vessels and kidneys resolved after 6 months of glucocorticoid treatment.
From the Division of Rheumatic Diseases, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo 162-8655 Japan.
Received for publication March 26, 2019; revision accepted July 21, 2019.
Conflicts of interest and sources of funding: This study was supported by a grant from the National Center for Global Health and Medicine (no. 29-2005). None declared to all authors.
Correspondence to: Hiroyuki Yamashita, MD, PhD, Division of Rheumatic Diseases, National Center for Global Health and Medicine, 1-21-1 Toyama, Shinjuku, Tokyo 162-8655 Japan. E-mail: firstname.lastname@example.org.