Such increase of desaturated FA bond(s) in tumor PLs likely reflects the upregulated stearoyl-CoA desaturase activity that introduced the Δ-9 unsaturated bond in palmitoyl and stearoyl FA moieties in the de novo synthesized tumor PCs in bulk and lowered the saturated FA to MUFA ratio (29, 52, 53). The gene discussed is SCD; the disease is neoplasm.