Figure 2: Kaplan–Meier log rank analysis of PTL patients. (a) OS and PFS of 22 PTL patients. (b) OS and (c) PFS classified by different Ann Arbor stages (I/II vs III/IV) are shown. Both OS and PFS of Ann Arbor stage I/II were significantly longer than advanced stage patients (P < 0.001 and P = 0.001, respectively). PTL: primary testicular lymphoma; OS: overall survival; PFS: progression-free survival.