IFNG and Miyoshi myopathy: A total of 8 of 9 MGUS subjects, 7 of 12 MM stage I patients, and 3 of 9 patients with MM stage II/III had T cells producing IFN-γ and/or IL-2 (T helper (Th1) type-1 cells), while cells producing both Th1 and Th2 or Th0 types of cytokines were more common in subjects with MM, especially in those with MM stage II/III.