Osteomalacia?,”Patients with osteomalacia due to Vitamin D deficiency have low or low-normal serum calcium, low serum phosphate, increased serum PTH, low plasma 25-OH vitamin D levels, and elevated alkaline phosphatase. Unlike osteoporosis
most patients complain of bone pain and muscle weakness. X-ray findings include decreased bone density with thinning of cortex and pseudofractures (Looser zones).”