KIF18A and breast cancer: KIF18A expression is low in normal tissues and high in solid tumors, including breast cancer (BRCA) [9,10,11], hepatocellular carcinoma (HCC) [12,13] and lung adenocarcinoma (LUAD) [14,15], colorectal cancer(COAD) [16], renal cell carcinoma (RCC) [17], and head and neck squamous cell carcinoma (HNSCC) [18].