A suspected case of IgG4-related bilateral arthritis of the knee

Affiliations

• ¹ Department of Orthopaedic Surgery, Kitakyushu Municipal Medical Center, 2-1-1, Bashaku, Kokurakita-ku, Kitakyushu-shi, Fukuoka 802-0077, Japan. Electronic address: ofrutmhio@outlook.jp.
• ² Department of Internal Medicine, Kitakyushu Municipal Medical Center, 2-1-1, Bashaku, Kokurakita-ku, Kitakyushu-shi, Fukuoka 802-0077, Japan.
• ³ Department of Pathology, Kitakyushu Municipal Medical Center, 2-1-1, Bashaku, Kokurakita-ku, Kitakyushu-shi, Fukuoka 802-0077, Japan.
• ⁴ Department of Orthopaedic Surgery, Kitakyushu Municipal Medical Center, 2-1-1, Bashaku, Kokurakita-ku, Kitakyushu-shi, Fukuoka 802-0077, Japan.