NEW ORLEANS — Postmenopausal women with osteoporosis may not be receiving all the recommended tests to rule out secondary causes of bone loss prior to treatment initiation, new research found.
In a single-center chart review of 150 postmenopausal women who had been diagnosed and treated for osteoporosis, most had received a complete blood cell count, basic metabolic panel, thyroid screening, and vitamin D testing. However, one in four had not been tested for a parathyroid hormone (PTH) level, and in nearly two thirds, a 24-hour urine calcium collection had not been ordered.
Overall, less than a third had received the complete workup for secondary osteoporosis causes as recommended by the American Association of Clinical Endocrinologists (AACE) and the Endocrine Society.
“An appropriate evaluation for secondary causes of osteoporosis is essential because it impacts different treatment options and modalities. We discovered low rates of complete testing for secondary causes of osteoporosis in our patient population prior to treatment initiation,” said Kajol Manglani, MD, an internal medicine resident at Georgetown University/MedStar Washington Hospital Center, Washington, DC, and colleagues, in a poster at the American Association of Clinical Endocrinology (AACE) annual meeting held on May 9-12, 2024.
First author Sheetal Bulchandani, MD, said in an interview, “It depends a lot on clinical judgment, but there are certain things that everybody with osteoporosis should be evaluated for. We looked for the things that all the guidelines recommend.”
Studies have suggested that up to 30% of postmenopausal women with osteoporosis have secondary causes, noted Dr. Bulchandani, who conducted the study as a postdoctoral fellow with colleagues at Georgetown University/MedStar Washington Hospital and is now in private endocrine practice in Petersburg, Virginia.
“It’s important not to assume that every woman who walks in with osteoporosis has postmenopausal osteoporosis. I think it would be appropriate to at least discuss with the patients what would warrant certain kinds of clinical workup. … If you don’t figure out if there is an underlying cause, you may end up using an unnecessary medication,” Dr. Bulchandani said.
Are You Missing Something Treatable?
For example, she said, if the patient has underlying hyperparathyroidism and is treated with osteoporosis medications, “you might not see the desired or expected outcome in their bone density.”
Asked to comment, Rachel Pessah-Pollack, MD, clinical associate professor at the Holman Division of Endocrinology, Diabetes, and Metabolism at New York University School of Medicine, New York City, told this news organization, “Certainly, if you have patients who have osteoporosis, it’s important to take a good history and consider secondary causes of bone loss because you may find a treatable etiology that actually can improve their bone density without even starting on a medication.”
Dr. Pessah-Pollack, who was an author of the 2020 AACE/American College of Endocrinology 2020 Clinical Practice Guidelines for the Diagnosis and Treatment of Osteoporosis, said a 24-hour urine calcium collection, not a spot calcium check, is “super important because you’re looking to see if there’s any evidence of hypercalciuria or malabsorption that may be associated with higher rates of bone loss. … These may be a little more cumbersome and harder to get patients to do and more logistics to arrange. But clearly, if you pick up hypercalciuria, that is a potentially treatable etiology and can improve bone density as well.”
Another example, Dr. Pessah-Pollack said, is “if they have a low serum calcium level and high PTH, that would be a real reason to look for celiac disease. By not getting that PTH level, you may be missing that potential diagnosis. There is a wide range of additional causes of osteoporosis ranging from common conditions such as hyperthyroidism to rare conditions such as Cushing disease.”