What does calcium level of 8.9 mg/dl and phosphorus level of 7.5 mg/dl indicate?
Patient: I am 23 yr old female 65kg/5 feet 2 inches with a history of TB and gall bladder stones.My calcium level is 8.9 mg/dl and phosphorus level is 7.5 mg/dl.My LFTs are normal.I am thinking of a diagnosis of hyperparathyroidism?? I have taken a test for PTH now and am awaiting the result. Doctor: Hi,Thankyou for your quiry.As parathyroid is a gland  that regulate bone miniralization.And when ever there is decreased plasma calcium , parathyroid hormone from gland is released to increase vit D active form formation by kidney , which in turn increase calciumabsoption in intestine and vice versa.Normal range of calcium at this age is 10 to 12 mg and phosporus level normaly is 2.4 to 4.1 mg per dl.That means you have low calcium level  and high phosphorus level both factors stimulate parathyroid hormone so hyperparathyroudism.Since all these minerals regulation can be also effected by  kidney problem.I would suggest that  you should also get kidney profile  and urine calcium and phisphorus tests done first and discuss with nephrologist .hopefully my  answer will be helpfull for you.regards,Dr.Maheshwari