Back pain in an elderly patient with hypercalcemia is most suggestive of which diagnosis?

Back pain in an elderly patient with hypercalcemia is most suggestive of which diagnosis?

• A. Multiple myeloma or metastases
• B. Osteoarthritis
• C. Osteoporosis
• D. Spinal stenosis

Answer: (A)

Back pain with hypercalcemia in an elderly patient points toward a bone-destructive process, most classically multiple myeloma or metastatic cancer involving the spine. In multiple myeloma, malignant plasma cells activate osteoclasts, causing osteolytic lesions in the vertebrae. Those lesions release calcium into the bloodstream, leading to hypercalcemia, and weaken the bones enough to produce back pain and a risk of vertebral fracture. Metastatic spread to the spine from solid tumors (like breast, prostate, or lung cancer) can create similar lytic lesions and calcium release, causing the same clinical picture. Osteoarthritis and spinal stenosis cause back pain through degeneration or nerve compression, but they do not typically raise calcium levels. Osteoporosis increases fracture risk and can cause back pain from fractures, but it does not usually drive hypercalcemia.

Back pain with hypercalcemia in an elderly patient points toward a bone-destructive process, most classically multiple myeloma or metastatic cancer involving the spine. In multiple myeloma, malignant plasma cells activate osteoclasts, causing osteolytic lesions in the vertebrae. Those lesions release calcium into the bloodstream, leading to hypercalcemia, and weaken the bones enough to produce back pain and a risk of vertebral fracture. Metastatic spread to the spine from solid tumors (like breast, prostate, or lung cancer) can create similar lytic lesions and calcium release, causing the same clinical picture.

Osteoarthritis and spinal stenosis cause back pain through degeneration or nerve compression, but they do not typically raise calcium levels. Osteoporosis increases fracture risk and can cause back pain from fractures, but it does not usually drive hypercalcemia.