YY1 and hereditary pheochromocytoma-paraganglioma: In addition, the same study showed that only cholangiocarcinoma, DLBC, and KIRP cases with genetic alteration had copy number deletion of YY1, while the “amplification” type of CNVs was only seen in adrenocortical carcinoma and pheochromocytoma/paraganglioma tumors [52].