ACE and myeloid sarcoma: To date, several reports have described significantly increased ACE activity in cerebrospinal fluid and serum among patients with MS (Constantinescu, Goodman, Grossman, Mannon, & Cohen, 1997; Kawajiri et al., 2008; Schweisfurth, Schiöberg‐Schiegnitz, Kuhn, & Parusel, 1987).