1 Distance between North Carolina, NC and cities in North Carolina. 2  Distance between North Dakota, ND and cities in North Dakota. 3  Distance between Ohio, OH and cities in Ohio.
HER2 is a proto-oncogene that encodes an 185 k Datrans membrane receptor tyrosine kinase which exhibits extensive homology to epidermal growth factor receptor (EGFR) .HER2 is also known as the neu and cerbB2 proto-oncogene.ER2 is a proto-oncogene that encodes an 185 k Datrans membrane receptor tyrosine kinase which exhibits extensive homology to epidermal growth factor receptor (EGFR) .
HER2 testing is not done routinely for ductal carcinoma in situ, except as part of a clinical trial. Whenever breast cancer recurs or spreads, the cancer cells should be retested for HER2 as well as for hormone receptor status, as these can change from the original diagnosis.