Figure 2.

The risk group model classifying the risk of recurrence of thymic epithelial tumors after complete resection. The model incorporate both the Masaoka-Koga stage and WHO histological classification systems, which were grouped into four categories as indicated. The 406 patients who underwent complete resection for TETs were initially classified into nine subgroups. (A) The freedom-from-recurrence rates of patients in the nine initial subgroups at the 5-year time point; (B) the proposed grouping system to assess the risk of recurrence after complete resection; (C) freedom-from-recurrence curves stratified by recurrence risk groups. 5Y-FFR, 5-year-freedom-from-recurrence rate.