Tumor morphology (APOE, BIRC5, CD14, COL1A1, COL1A2, CYR61, FKBP1A, IL8, MCAM, MIF, RHOB) was the most enriched functional category among the 73 genes overexpressed in the macrodissected samples (feature selection P < 10-6) by IPA (Table 3). Here, APOE is linked to neoplasm.