L1CAM and endometrial carcinoma: In order to identify an optimal target for NIRF imaging of xenograft models, selected cell surface proteins (EpCAM, activated leukocyte cell adhesion molecule (ALCAM), insulin-like growth factor 1 receptor alpha (IGF1R), and L1 cell adhesion molecule (L1CAM)) reported to be expressed in endometrial carcinoma [26,27,28,29,30,31,32,33] were screened by flow cytometry in the endometrial carcinoma cell line Ishikawa.