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 -2  (nbme23#39)

PTH is increased because serum calcium is low. Because PTH is increased, phosphorous is decreased. The woman in unable to absorb vitamin D (a fat soluble vitamin), so calcitriol is decreased (no vitamin D for the kidney to activate into calcitriol).

gabeb71  What does this have to do with the Celiac Sprue?
medpsychosis  I believe they were explaining the reason for the mentioned "mild osteopenia" in the pt presentation.
meningitis  No, I think this person got confused with another question about celiac sprue, PTH, Calcitriol, and Vit D (it was an arrow type question).
diabetes  explanation for decreased bone density .

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