It is interesting that despite the importance of P-selectin in peritoneal carcinomatosis, none of the studies found involvement of its primary ligand P-selectin glycoprotein ligand-1 (PSGL-1), a well-characterized ligand that is important in metastasis and platelet aggregation in other malignancies like prostate and lung cancer [69]. The gene discussed is SELPLG; the disease is lung cancer.