SLAMF7 and neoplasm: Among potential eat-me signals, we found significant overexpression of C1Q complement components C1qa, C1qb, and C1qc, which have been shown to decorate the surface of apoptotic cells to target them for phagocytosis (40, 41) (Fig. 3B), and of Slamf7, which is involved in phagocytosis of hematopoietic tumor cells (42).