DHCR7 and hereditary pheochromocytoma-paraganglioma: Conversely, DHCR7 mRNA expression was low in CHOL (cholangiocarcinoma), KIRC (kidney renal clear cell carcinoma), KIRP (kidney renal papillary carcinoma), and PCPG (pheochromocytoma and paraganglioma) (Figure 1B).