<prompt> All of the following are true about osteomalacia EXCEPT:Vitamin D deficiencyProximal myopathyRaised serum calciumBone biopsy shows increased demineralized bone matrix  <response>: Ans. c Raised serum calciumRef: Maheswaris 5th310, 311In osteomalacia the serum calcium level is low, the phosphates are low, and alkaline phosphatase is high.PATHOPHYSIOLOGY OF OSTEOMALACIALack of sunlight exposure, nutritional deficiency of vitamin D, malabsorption syndrome, partial gastrectomyFailure of absorption of calcium and phosphorous Decreased serum calcium and phosphorousDecreased turnover of calcium and phosphorus in bone matrixDemineralization of bone and bony substance replaced by soft osteoid tissueBone pains, muscular weakness myopathy, spontaneous fracturesNOTE: Osteoid matrix is secreted at normal rate but the mineralization is decreased i.e. decrease in mineral apposition rate. This leads to increased osteoid maturation time.Radiological Features Loosers Zone pseudo fracture- Are radiolucent zones at sites of stress. Triradiate pelvis in female. 