Intact parathyroid hormone (PTH, 41 pg/mL) and 1, 25-dehydroxy vitamin D3 level (38 pg/mL) levels were also within normal ranges, and tumor markers such as parathyroid hormone related peptide (PTHrP), squamous cell carcinoma-related antigen (SCC), and cytokeratin 19 fragment (CYFRA 21-1 antigen) were negative. Here, PTH is linked to neoplasm.