CBLN1 and obesity due to melanocortin 4 receptor deficiency: ROC analysis between obese and normal group subjects identified PE (16:0e/22:4), Cer (d16:0/16:0), DG (36:2e), Cer (d18:1/16:0), and DG (18:2/20:4) as potential predictors for postoperative obesity in craniopharyngioma patients.