Additionally, TUBB2B was upregulated in tumors with high KMT9α expression (fold change 5.25; raw P = 8.54 × 10−4; adj P = 6.66 × 10−2), which is considered a marker of small-cell/neuroendocrine-like urothelial carcinoma [30,31,32]. Here, TUBB2B is linked to urothelial carcinoma.