What should you know about hypercalcemia in prostate cancer?

Calcium may rise when bone is releasing more mineral, when dehydration concentrates the blood, or because of medicines, parathyroid disease, or kidney problems. Prostate cancer can affect bones, but a calcium result alone does not show why it is high or whether cancer has progressed.

Possible symptoms include thirst, frequent urination, constipation, nausea, abdominal discomfort, muscle weakness, drowsiness, confusion, and changes in heartbeat. Blood tests usually assess calcium and kidney function, while the oncology team decides whether imaging or other cancer tests are needed.

Tell the prostate cancer team promptly about a high calcium result, worsening thirst, vomiting, constipation, weakness, or changes in alertness. Treatment may involve fluids and bone-directed medicines, while the cancer plan is reviewed. Depending on the disease and previous care, the team may discuss radiotherapy, targeted radioisotope therapy, hormone or systemic treatment, bone-strengthening therapy, or surgery. Avoid calcium supplements unless prescribed.

Go to emergency care for confusion, fainting, severe drowsiness, repeated vomiting, inability to drink, chest pain, a racing or irregular heartbeat, or very little urine. New severe back pain, leg weakness, or loss of bladder control also needs urgent assessment because prostate cancer can affect the spine and nerves.

Ask what may be raising the calcium, whether kidney function is affected, how quickly treatment is needed, whether bone imaging is appropriate, and how current prostate cancer treatment should change. Mention any difficulty passing urine, new pain, or confusion.