Calcium and parathyroid

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MCKAY john - 14 May 2007 23:17 GMT

Male 66 yrs.
What is going on when PTH intact is over 20 pmol/L (about three x normal max)
and Ca is 2.14 mmol/L and ionized is 1.13 mmol/L and Ca ionized normalized is
1.15 mmol/L?

Intake of milk is - for many years - about 2/3 liter/day.

Thanks.

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Robert1 - 15 May 2007 18:56 GMT

> Male 66 yrs.
> What is going on when PTH intact is over 20 pmol/L (about three x normal max)
[quoted text clipped - 4 lines]
>
> Thanks.

I wrote a longer response earlier but it didn't go through so let me
give a short response here.
One needs a clinical context in order to properly interpret the
results but it appears that the ionized calcium is normal with an
elevated PTH.
People with osteoporosis can have elevated PTH levels some of which
can be outside assay range levels. The PTH has been found to be
inversely related to calcidiol [25(OH)D]. So I would be interested in
that level.
A normal ionized calcium argues against primary hyperparathyroidism
and more towards secondary hyperparathyroidism. Hope it helps.
Good luck.

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