NCIt definition : A metabolic bone disease that results from either a deficiency in vitamin D, or an
abnormality in the metabolism of vitamin D, or a deficiency of calcium in the diet.
The most common symptoms are bone pain and muscle weakness. When it occurs in children
it is commonly referred to as rickets. (Diagnostic Surgical Pathology, 3rd ed.) --2003;
Alternative definition : NICHD: Decreased mineralization of newly formed osteoid at sites of bone turnover
in established bone due to deficiency of calcium, phosphate, or vitamin D.;