MTAP and metastatic malignant neoplasm in the lymph nodes: MTAP expression was significantly linked to pT stage (p = 0.0004, Supplementary Table 2), classical and quantitative Gleason grade (p < 0.0001 each), and presence of lymph node metastasis (p = 0.0315, but was unrelated to PSA recurrence (p > 0.1779, Figure 3a).