NBME Answers ↦
Inadvertent and abrupt ligation of an artery kills the blood supply to tissue (ISCHEMIA). The tissue (parathyroid gland) will begin to undergo necrosis, releasing its contents, which, in this case, includes a boatload of PTH.
why wouldn’t a branch of the external carotid also be a valid answer? does the superior thyroid not also give arterial supply to the parathyroid glands? it seems to me that it could be either of these.
@brendan Superior thyroid provides mostly collateral support. The inferior thyroid is the primary supply and thus the “single best answer.” Remember, the other choices don’t have to be WRONG—they’re just not the best.
I got that it must be some vein, I just didn’t know the tributaries. Oh well, anatomy fucks me again!
I believe this would be more likely called a type of pseudohypoparathyroidism. Akin to PTH resistance, the PTH just can't get out to do its thing. Good catch though, I didn't even get what was happening here.
"Each parathyroid vein drains into the superior, middle and inferior thyroid veins. The superior and middle thyroid veins drain into the internal jugular vein, and the inferior thyroid vein drains into the brachiocephalic vein."