ERBB2 and neoplasm: Due to the previously recalled limitations, we were exclusively able to provide images in support of two cases, i.e., a patient initially diagnosed with a HER2-negative tumor, who tested positive for HER2 when assessed at the time of relapse (Fig. 1a,b), and a case of initially HER2-positive tumor, which confirmed HER2 status at relapse (Fig. 2a,b).