Some studies assessed the role of additional molecular marker to complement parafibromin staining in the screening process, emerging the protein 9.5 (PGP9.5) encoded by the ubiquitin carboxyl-terminal esterase L1 (UCHL1), that was found to be upregulated in the majority of parathyroid carcinomas [46]. Here, CDC73 is linked to parathyroid gland carcinoma.