<prompt> All may be seen in hyperparathyroidism ExceptSolitary adenomaIts malignantThyroid malignancyOsteomalacia  <response>: Osteomalacia is the softening of the bones caused by impaired bone metabolism primarily due to inadequate levels of available phosphate, calcium, and vitamin D, or because of resorption of calcium. The impairment of bone metabolism causes inadequate bone mineralization . Its causes Ref - Pubmed.com 