Can lung cancer cause bone metastases?

Cancer cells can leave a lung tumour, travel through blood or lymph channels, and settle in bone. This is metastatic lung cancer, not a new primary bone cancer. Bone spread is a known presentation of advanced lung cancer, although not every person with lung cancer develops it.

Metastases can disrupt the normal balance in which bone is broken down and rebuilt. Affected bone may become painful or weaker, which can increase the chance of a fracture. Bone changes may also release calcium into the bloodstream, leading to thirst, constipation, nausea, weakness, drowsiness, or confusion.

Spinal metastases can press on nerves or the spinal cord. The location and extent of spread, the lung cancer type, molecular test results, previous treatments, symptoms, and overall health all influence treatment choices.

Tell your cancer team about new persistent bone pain, pain that is worse at night or with movement, or difficulty using a limb. Assessment may include an examination, blood tests, and imaging. Occasionally, a tissue sample is required when the cause of a bone abnormality is uncertain.

Care may combine treatment for lung cancer with measures aimed at the affected bone. Options can include anticancer medicines, radiotherapy to a painful or vulnerable area, medicines that help protect bone, pain relief, or an operation to stabilise a weakened bone. Rehabilitation and mobility support can help preserve safe movement. The plan is individual and may change as symptoms and scan findings change.

Contact your cancer team urgently for sudden severe bone pain, inability to bear weight, or a limb that looks shortened or out of shape, as these can indicate a fracture. New marked thirst, vomiting, unusual sleepiness, or confusion also needs prompt assessment because the blood calcium level may be high.

Go to emergency care immediately for new back or neck pain accompanied by leg weakness, numbness, difficulty walking, loss of bladder or bowel control, or numbness around the buttocks or genitals. These features can indicate spinal cord compression, where faster assessment can help prevent lasting nerve damage.

Ask which scan shows the bone changes, whether they weaken a weight-bearing bone or affect the spine, and whether a biopsy is necessary. Other useful questions cover the goal of each treatment, how pain will be managed, what movement is safe, whether bone-protecting medicine is suitable, and who to call if symptoms worsen outside clinic hours.