A 71-year-old man is brought to the urgent clinic having a sudden onset of severe lower back pain. Upon conducting a physical examination of the patient, severe kyphosis is revealed. An x-ray of the back shows a compression fracture in the lumbar area of a vertebral body associated with marked thinning of the bones as well. Laboratory tests measuring serum calcium, alkaline phosphatase, phosphorus, and parathyroid hormone levels, all come back within the normal range.
What is the most likely reason behind the bone changes in this patient?
A- Osteitis fibrosa cystica
B- Osteoporosis
C- Osteopetrosis
D- Osteomalacia