Ayano Sugihara, Hiroshi Ureshino, Masatora Yamasaki, Makoto Fukuda, Maki Yoshihara, Eriko Nonaka, Mariko Miyazaki, Mai Fujita, Keitaro Ishii, Kazuharu Kamachi, Haruhiko Sano, Sho Okamoto, Hidekazu Itamura, Mariko Yoshimura, Hiroo Katsuya, Toshihiko Ando, Shigehisa Aoki, Yoshifumi Ubara, Shinya Kimura
A 67-year-old man complained of lower limb edema with a purpuric skin rash. Laboratory tests revealed proteinuria, elevated serum creatinine levels, and low serum albumin levels. The patient was also positive for cryoglobulin in serum, immunoglobulin (Ig) M gammopathy, hypocomplementemia, and rheumatoid factor. He was negative for anti-hepatitis C virus antibodies. A pathological analysis of the renal tissue revealed membranoproliferative glomerulonephritis, common histological features of cryoglobulinemic vasculitis (CV), and mucosa-associated lymphoid tissue lymphoma invasion...
2023: Internal Medicine