MET and neoplasm: A recent study showed that MET proto-oncogene activation is important for tumor growth in PanNET xenograft models: this approach allowed the identification of a highly tumorigenic cell population within several independent, surgically acquired PanNETs, characterized by increased cell-surface protein CD90 expression and aldehyde dehydrogenase A1 (ALDHA1) activity, displaying in vitro and in vivo evidence for stem-like properties.