[Parathyroid Hormone-related Peptide (PTHrP) Producing Lung Cancer Presenting Hypercalcemia; Report of a Case].

: An 82-year-old man was admitted to our hospital with hemoptysis and weight loss. Chest computed tomography(CT) showed a 90 mm mass with cavity formation in the right lower lobe adjacent to chest wall. Laboratory data revealed hypercalcemia and elevation of parathyroid hormone-related protein C (PTHrP). He was diagnosed as squamous cell carcinoma of lung by transbronchial lung biopsy (TBLB) [cT3aN1M0]. Nausea and anorexia due to hypercalcemia became worse and a right middle and lower lobectomy was performed because of difficult control of symptoms by medicine and worsening of his general condition. His symptoms were improved immediately after surgery.