Tumor tissues of breast invasive carcinoma (BRCA), esophageal carcinoma (ESCA), pheochromocytoma, paraganglioma (PCPG), glioblastoma multiforme (GBM), stomach adenocarcinoma (STAD), and uterine corpus endometrioid carcinoma (UCEC) had higher SLC31A1 expression levels when compared to corresponding normal tissues (all P < 0.01). This evidence concerns the gene SLC31A1 and paraganglioma.