Pathology A 65-year-old male diagnosed by biopsy a case of squamous cell carcinoma of lung, has very high serum calcium levels. Probable cause is? A Parathyroid hormone B Parathyroid hormone-related peptide C Calcitonin D Calcitonin-related peptide 💡 Explanation A 65-year-old male diagnosed by biopsy a case of squamous cell carcinoma of lung, has very high serum calcium levels. Probable cause is? ✓ Correct Answer: B. Parathyroid hormone-related peptide