To see whether the ratio between the complete MPL-reactive and truncated VVL-reactive IgG O-glycans (T-antigen and Tn-antigen, respectively) could be of importance in differentiating the group with advanced endometriosis from the rest of the study groups, the MPL/VVL ratio was calculated based on IgG relative reactivity with these two lectins (Table 1). This evidence concerns the gene TBXT and endometriosis.