Changes

* Rare.

* Rare.

===Secondary===

===Secondary===

* Secondary hyperparathyroidism causes [[Bones Metabolic - Pathology#Hyperparathyroidism|fibrous osteodystrophy or "rubber jaw"]].

* Secondary hyperparathyroidism causes [[Hyperparathyroidism|fibrous osteodystrophy or "rubber jaw"]].

* In secondary hyperparathyroidism, the gland is overactive due to another condition coexisting in the body, rather than a primary parathyroid gland defect.  

* In secondary hyperparathyroidism, the gland is overactive due to another condition coexisting in the body, rather than a primary parathyroid gland defect.  

* There are two common forms of secondary hyperparathyroisism:

* There are two common forms of secondary hyperparathyroisism:

**Bones soft and pliable

**Bones soft and pliable

**Canine teeth easily removed - rubber jaw

**Canine teeth easily removed - rubber jaw

**Microscopically - ''Osteodystrophia fibrosa'' (above  = fibrous osteodystrophy) +/- [[Bones Metabolic - Pathology#Osteomalacia|osteomalacia]]

**Microscopically - ''Osteodystrophia fibrosa'' (above  = fibrous osteodystrophy) +/- [[Osteomalacia|osteomalacia]]