Which finding is an established indication for parathyroidectomy in an asymptomatic patient with primary hyperparathyroidism?

Which finding is an established indication for parathyroidectomy in an asymptomatic patient with primary hyperparathyroidism?

• A. Serum calcium level greater than the upper limit of normal by 1.0 mg/dL
• B. Creatinine clearance less than 60 mL/min
• C. Bone mineral density with a T-score less than −2.5 at any site
• D. Age younger than 50

Answer: (C)

In asymptomatic primary hyperparathyroidism, decisions about surgery hinge on evidence of end-organ impact or risk, not just the absence of symptoms. The most clear, objective indication here is osteoporosis demonstrated by a bone density T-score of -2.5 or lower at any skeletal site. That level of bone loss reflects significant skeletal involvement from excess parathyroid hormone, translating to a markedly increased fracture risk. Removing the overactive gland often stabilizes or improves bone density and reduces future fractures, making this an established surgical indication. Other factors like elevated calcium, reduced kidney function, or younger age are also considerations in many guidelines, but the presence of osteoporosis provides a definitive, quantitative reason to proceed with surgery.

In asymptomatic primary hyperparathyroidism, decisions about surgery hinge on evidence of end-organ impact or risk, not just the absence of symptoms. The most clear, objective indication here is osteoporosis demonstrated by a bone density T-score of -2.5 or lower at any skeletal site. That level of bone loss reflects significant skeletal involvement from excess parathyroid hormone, translating to a markedly increased fracture risk. Removing the overactive gland often stabilizes or improves bone density and reduces future fractures, making this an established surgical indication.

Other factors like elevated calcium, reduced kidney function, or younger age are also considerations in many guidelines, but the presence of osteoporosis provides a definitive, quantitative reason to proceed with surgery.