With an index value of more than seven units (AUC = 0.889) and a sensitivity of 80.56% and a specificity of 93.33%, it is possible to assume the presence of sarcoidosis.DS = (B-naïve/B-memory*(CD38-B-cells + CD5-B-cells)*[anti-MCV]/100(1). The gene discussed is CD38; the disease is sarcoidosis.