📝Download it free here: runthelistpodcast.com/endocrinology/…
🎶Episode: apple.co/2XhpRIU
check out👇for a #tweetorial on PTH-dependent & PTH-independent causes of hyperCa
as a result, calciostat (CaSR) is at a higher "setpoint"*
thus, ⬆️PTH ("inappropriately normal") -> ⬆️Ca via bone resorption & ⬆️Ca reabsorption via the kidney (see below) -> hypercalcemia & hypocalciuria
*really running w/ analogy here...
@ohamnvik teaches us to think in TWO major buckets:
1⃣PTH-dependent
2⃣PTH-independent
@haematognomist made this nice framework 👇
2 more frameworks @PennMedicine & @CPSolvers: med.upenn.edu/frameworks/hyp…
clinicalproblemsolving.com/dx-schema-hype…
for more on TUMS-induced hypercalcemia (i.e. Milk Alkali Syndrome) check out Episode 79 from our friends at @CPSolvers & case presenter @AnandJag1:
clinicalproblemsolving.com/2020/04/19/epi…
hypercalcemia = secondary to the lytic bone lesions seen w/ MM
for more clinical practice w/ hyperCa in malignancy:
VMR 52 w/ @tmodarressi: clinicalproblemsolving.com/morning-report…
VMR 63: clinicalproblemsolving.com/morning-report…
[10]
typically start to see sx at ~11.5 mg/dL, severe sx >13 mg/dL
Remember the "classic" hyperCa sx (see image👇)
*HyperCa can precipitate nephrogenic diabetes insipidus (NDI) -> polyuria, & pancreatitis
in PRIMARY hyperparathyroidism, what are the typical labs?
Primary hyperparathyroidism: ⬆️/nl PTH, ⬆️Ca, ⬇️phos
Tertiary hyperparathyroidism: ⬆️⬆️ PTH, ⬆️Ca, ⬆️phos (due to ESRD)
mdedge.com/clinicianrevie…
(sneak peek: he'll be back tomorrow for a Hypocalcemia episode!)
apple.co/2XhpRIU
-Ionized = "free" Ca, which controls PTH level
-Ca sensed in parathyroid Chief cells by CaSR
-CaSR LoF mut. -> FHH
-PTH -> ⬆️Ca, ⬆️active vit. D, ⬇️phos
-HyperCa causes: PTH-dependent (primary, tertiary) & -independent (cancer, vit. D, other)
runthelistpodcast.com/endocrinology/…
[1]uclahealth.org/endocrine-cent…
[2]nejm.org/doi/full/10.10…
[3]proteinatlas.org/learn/dictiona…
[4]nature.com/articles/s4157…
[5]
[6]nature.com/articles/nrdp2…
[7]frontiersin.org/articles/10.33…
[8]sciencedirect.com/topics/medicin…
[9]jasn.asnjournals.org/content/19/4/6…
10]aafp.org/afp/2017/0315/…