CDC73 and tumor of parathyroid gland: After informed consent was obtained, we directly sequenced the full coding and flanking splice-junctional regions of the CDC73 gene in the patient's blood and parathyroid tumor and found a somatic frameshift mutation of CDC73 gene in exon1 (c.70delG) which caused premature stop codon in amino acid 26 (p.Glu24Lysfs*2).