Hello! I have been diagnosed with hyperparathyroidism recently by measns of blood work, 24 hr urine catch, elevated PTH, and a bone density test which shows some osteoporosis, in my forearm s well as hip and back. Also I have a thyroid nodule that nearly fills one lobe now, FN aspirated a few years ago showing benign, it has grown some over the last ten years....two smaller ones, I guess inconsequentioal in the other lobe. Two days ago I noticed a change in a baby fingernail...as in symptoms of koilonychia..the tip of the finger itself is turned upward, nail looks scooped in profile, thickend white appearance more than half the nail upward from nail bed forming an indentation therefore midway. What I m reading online is that parathyroidism and vit. D deficiency would produce a lowered blood calcium, whereas mine is above normal, so I am confused. Wouldn t an absorption problem result in a higher blood calcium level? and what is the relationship of hyperathyroidism and a thyroid nodule. My father pass 50 yrs ago with a pituitary tumor..any reason to suspect a correlation? I am scheduled to see a surgeon in a few days, but the change in fingernail causes me concern. My endocrinologist reports no sign of kidney stones, but could the fingernail indicate a different problem with my kidneys?