A 60-year-old male presents with renal colic, hematuria, elevated serum calcium (Ca), low serum phosphorus (P), normal renal function, increased parathyroid hormone levels, and osteopenia on X-ray. The most likely diagnosis is:
A 60-year-old male presents with renal colic, hematuria, elevated serum calcium (Ca), low serum phosphorus (P), normal renal function, increased parathyroid hormone levels, and osteopenia on X-ray. The most likely diagnosis is: