Medicine General ebbbabeb Increased Calcium with Decreased Phosphate levels are seen in: A Primary hyperparathyroidism B Secondary hyperparathyroidism due to Vitamin D deficiency C Malignancy with lytic bone lesions D Osteoporosis High-Yield Explanation Answer is A (Primary Hyperparathyroidism): Serum Calcium with Decreased Serum Phosphate levels are typical of Primary Hyperparathyroidism