Endocrinology
Physician discussions on diabetes management, thyroid disorders, hormonal imbalances, and metabolic conditions.
Recent Discussions
How effective is vibration plate therapy for the treatment of osteoporosis?
I served as a consultant for NASA on the Human Performance Committee for 35 years. The vibrating plate was developed by NASA thinking that the vibration would mimic the piezoelectric effect of the gravitational pull of muscle and loading on the skeleton to prevent bone loss in the weightless environ...
What goes into your decision making when choosing between oral and intravenous bisphosphonate therapies for osteoporosis?
From my perspective if you are going to give a bisphosphonate IV is preferred since it is convenient and there is no risks of GI side effects and issues of compliance. I do not think there is any significant difference in causing ONJ and subtrochanteric femoral fractures. However my preference is De...
In patients with a history of retinal vein occlusion, how should the risk of recurrent thromboembolic events influence the selection of osteoporosis therapies?
The FDA-approved prescribing information for raloxifene explicitly lists retinal vein thrombosis alongside deep vein thrombosis and pulmonary embolism as contraindications.
How do you assess and adjust treatment in patients who develops hypothyroidism after being on lithium for several years?
It depends on whether the patient is symptomatic. If not, careful monitoring is all that is needed. If there are significant symptoms, treatment with levothyroxine would be needed. Continued use of lithium is appropriate if it has been effective over time.
Can you explain the block and replace approach in the treatment of thyrotoxicosis, including when it is most appropriate to use and how it compares to other treatment options?
More than 20 years ago, Japanese researchers had data that suggest that remission rates for Graves' disease was much better with the block and replacement treatment with Methimazole/carbimazole and Levothyroxine. At least 3 US and European studies did NOT confirm this observation. I do occasionally ...
Do you recommend monitoring Free T4 or Total T4 levels in pregnant patients with central hypothyroidism?
Free T4 immunoassays are inaccurate in pregnancy. In this scenario, I would either use total T4 with a goal range of 1.5 times the normal range, or I would order a "thyroid panel" that reports a Free Thyroxine Index, calculated from the total T4 and T3 resin uptake. The FTI is more reliable in pregn...
How do you evaluate remission in acromegaly when postoperative IGF-1 and GH levels are discordant?
It depends how long after surgery. IGF-1 may take up to 3 months form curative surgery to normalize. If GH is low (<0.4 ng/mL) and IGF-1 is still abnormal and you are less than 3 months form surgery, I would just wait. If the opposite is true (Normal IGF-1 but elevated random GH), I would perform a ...
Would you favor oral bisphosphonates over intravenous formulations for patients with hormone sensitive prostate cancer and androgen deprivation therapy (ADT) related osteopenia?
If kidney function is normal, either would do. Therapy depends on the risk level. (See Cosman et al., PMID 39073912.)
Would you recommend discontinuing testosterone replacement in a male patient in his 60s with newly diagnosed favorable intermediate-risk prostate cancer who is declining surgery and will receive definitive radiation?
Historically, we (as a field) have viewed TRT as the opposite of ADT and therefore inherently problematic. I am not convinced this is logical. ADT has RCT evidence to support it, whereas withdrawing TRT has not been as cleanly studied. Let's say we stop TRT, and this drops their testosterone to 150 ...
How do you manage pregnancy associated osteoporosis in post-partum patients with vertebral fractures?
I would make certain that the patient is getting adequate calcium and vitamin D and maintaining a serum 25-hydroxy vitamin D of at least 30 ng/mL. If the patient is breastfeeding, I would not give a bone active medication until breastfeeding has been halted. I would like a lot more information about...