Where prostate cancer spreads: Understanding metastasis
For many patients with early prostate cancer, tumours are slow-growing and may remain confined to the prostate for years. However, in some cases, cancer cells can spread beyond the prostate to other parts of the body, a process known as metastasis.
Understanding where prostate cancer spreads, how it is detected, and what it means for treatment is crucial for patients and their families.
How prostate cancer spreads
Prostate cancer can spread in several ways. Each route has different implications for treatment and prognosis.
Local spread
Local spread occurs when cancer grows directly into nearby tissues. In the case of prostate cancer, this often involves the seminal vesicles, which are glands near the prostate that help produce semen. Local spread can sometimes cause urinary symptoms, such as difficulty passing urine, blood in the urine, or changes in urinary frequency.
Lymphatic spread
The lymphatic system is a network of vessels and nodes that helps the body fight infection. Prostate cancer often spreads first to nearby lymph nodes in the pelvis. Enlarged lymph nodes may be initially detected through scans such as MRI. Lymphatic spread is important because it can influence treatment decisions, including whether surgery can be recommended.
Bloodstream spread
When prostate cancer enters the bloodstream, it can travel to distant parts of the body. This is known as haematogenous spread. The most common sites for distant prostate cancer metastasis are:
- Bones: the spine, hips, and pelvis are particularly vulnerable. Bone metastases may cause pain, fractures, or spinal cord compression in advanced cases.
- Liver: although less common, the liver can be affected, sometimes leading to jaundice or abdominal discomfort.
- Lungs: lung metastases are rarer but can cause breathlessness, coughing, or chest pain.
Detecting spread
Doctors use a combination of imaging tests, blood tests, and sometimes biopsies to detect whether prostate cancer has spread. Common imaging methods include MRI, CT scans, and nuclear medicine scans such as a bone scan or PSMA PET scan. Blood tests often measure prostate-specific antigen (PSA) levels, which can indicate cancer activity.
Implications for treatment
The spread of prostate cancer significantly influences treatment options. Localised cancer may be treated with surgery or radiation, while metastatic cancer often requires systemic therapies such as hormone therapy, chemotherapy, or newer targeted treatments. Early detection of metastasis can improve outcomes and allow tailored treatment plans.
Understanding where prostate cancer spreads is vital for managing the disease effectively.
If you are concerned about prostate cancer or its spread, consult with Professor Prabhakar Rajan via his Top Doctors profile for a thorough assessment and personalised management plan.