CXCL13 and peeling skin syndrome: However, the correlation of CXCL13 serum levels with the number of CXCL13-positive cells within the MSG inflammatory lesions found in this study and with various histologic parameters, including the degree of MSG inflammation and the presence of eGCs, shown in this and previous studies (24, 26, 29), suggest that at least a part of the elevated CXCL13 serum levels in pSS patients arise from the affected salivary glands.