RET and breast carcinoma: Oncogenic RET mutations were also detected in 0.5% (8/1489) of colorectal cancer and 0.2% (16/9693) of breast cancer, including Glu511Lys (E511K), G533C, Cys634Arg (C634R), E768D, V804M, and M918T mutations (32), (33), (45).