Immunohistochemistry of anti-CB2 antibody in spinal cord SRMA lesions.

A) Strong CB2 positive perivascular inflammatory infiltrates surrounding meningeal blood vessels. B) The CB2 positive leukocyte population mainly consists of lymphocytes, plasma cells and fewer macrophages. C) Severe diffuse infiltration of the dura mater with CB2 positive inflammatory cells. D) Vacuolization of white matter areas with concomitant CB2 positive glial cells and leukocytes. IHC was performed using the avidin-biotin-peroxidase complex (ABC) method.