|HER2 status of primary and matched recurrent lesion by immunohistochemistry*|
|HER2 negative||HER2 inconclusive||HER2 positive|
*Eighteen patients, where immunohistochemistry was not performed by the local laboratory on primary or recurrence, were excluded.
Chan et al.
Chan et al. BMC Cancer 2012 12:555 doi:10.1186/1471-2407-12-555