YWHAZ and cancer: Dual‐color FISH confirmed the existence of YWHAZ gain or amplification in UCUBs (Figure 1C), especially advanced‐stage cancers (T2–T4) (p < 0.001) with lymph node invasion (p = 0.027) and higher mitotic activity (HPF ≥ 10) (p = 0.003) (Table 1).