Secondary hyperparathyroidism  From Wikipedia, the free
encyclopedia Jump to: navigation, search Secondary
hyperparathyroidism Classification and external resources Illu
thyroid parathyroid.jpg Thyroid and parathyroid. ICD-10 E21.1
ICD-9 252.02, 588.81 DiseasesDB 6301 MedlinePlus 000318 MeSH
D006962  Secondary hyperparathyroidism refers to the excessive
secretion of parathyroid hormone (PTH) by the parathyroid glands
in response to hypocalcemia (low blood calcium levels) and
associated hypertrophy of the glands. This disorder is
especially seen in patients with chronic renal failure. It is
often—although not consistently—abbreviated as SHPT in medical
literature.  Signs and Symptoms[edit]  Bone and joint pain are
common, as are limb deformities. The elevated PTH has also
pleiotropic effects on blood, immune system and neurological
system.   The PTH is elevated due to decreased levels of calcium
or 1,25-dihydroxy-vitamin D3. It is usually seen in cases of
chronic renal disease or defective calcium receptors on