# Melanoma (metastatic)
What is it
Melanoma is cancer that develops in melanocytes—the cells that produce pigment (color) in the skin. When a melanoma is *metastatic*, this means cancer cells have spread through the blood or lymphatic system to other parts of the body. These metastases can be found in lymph nodes, lungs, liver, brain, bones, or skin in places other than where the original melanoma was located.
Melanoma is one of the more aggressive forms of skin cancer and typically grows faster than other skin cancers. It usually develops from an existing mole or as a new, irregular pigmented spot on the skin. With modern research, it is known that certain genetic changes (mutations) in cancer cells—such as in the BRAF gene—play a role in how quickly the cancer grows and how it responds to treatment.
Causes
The exact cause of melanoma is not fully understood, but several risk factors are known:
- **Exposure to ultraviolet (UV) radiation**: Prolonged or intense exposure to sunlight, especially at a young age, significantly increases the risk. Artificial UV radiation (tanning bed use) is also a risk factor.
- **Family history**: Melanoma can run in families. Hereditary factors, including those related to skin type and freckles, play a role.
- **Atypical moles**: People with many or irregular moles have a higher risk.
- **Genetic mutations in the tumor**: Genetic changes (mutations) occur in the cancer cells themselves that cause cells to grow uncontrollably. These are typically not inherited but result from DNA damage in the tumor itself.
- **Skin type**: People with light skin, blond or red hair, and freckles have an increased risk.
- **Weakened immune system**: Reduced immune defense can increase the risk.
How the disease progresses
Melanoma develops in stages. In the early stage, the cancer grows only in the skin (localized melanoma). If not treated, it can penetrate deeper skin layers and subsequently spread.
With **metastatic melanoma**, this means cancer cells have already escaped and established themselves elsewhere in the body. This can occur:
- **Regionally**: to nearby lymph nodes (lymph node involvement).
- **Distantly**: to lungs, liver, brain, bones, or skin in other locations.
Once metastatic, melanoma typically grows faster and becomes more difficult to manage with surgery alone. The disease shows waves of growth and sometimes periods of stabilization (depending on immune function and the specific characteristics of the tumor).
In later stages, the disease can affect multiple organs, leading to symptoms that depend on where the metastases are located. The disease itself is incurable in the sense that complete remission is difficult, but many modern treatments can keep the disease under control for extended periods.
Symptoms by phase
**Stage 1-2 (localized melanoma, usually before metastasis):**
- A new mole or change in an existing spot (irregular shape, multiple colors, growing larger).
- Red, itchy, or bleeding surface.
- This stage usually causes no systemic (whole-body) symptoms.
**Stage 3 (regional, lymph nodes involved):**
- Swollen lymph nodes near the melanoma (neck, armpits, groin).
- Sometimes no clear symptoms; discovered during screening.
**Stage 4 (metastatic melanoma):**
Symptoms depend on where the metastases are located:
- **Lungs**: Cough, shortness of breath, chest pain.
- **Liver**: Right upper abdominal pain, abdominal swelling, yellowing of the skin, fatigue.
- **Brain**: Headache, dizziness, balance problems, confusion, seizures, loss of movement.
- **Bones**: Aching joint pain, weakness in limbs if the spinal cord is involved.
- **Skin elsewhere**: New dark spots on the skin in other locations.
- **General**: Severe fatigue, weight loss, fever, general feeling of illness, loss of appetite.
What it means for daily life
A diagnosis of metastatic melanoma means major changes in daily life. This is emotionally heavy; many patients experience shock, fear, and grief about what could happen.
**Medical:**
- Regular (often monthly) hospital or outpatient visits for examinations, blood tests and imaging (CT, MRI) to monitor the disease.
- Treatments such as immunotherapy or targeted therapy, which come with side effects (fatigue, skin rash, joint pain, sometimes more serious effects on organs).
- Possible surgery or radiation to address metastases in the brain or elsewhere.
**Physical:**
- Fatigue is often the most limiting symptom—many patients can work or do housework less.
- Depending on metastases: difficulty with certain movements, concentration, balance.
- Side effects of treatment can cause skin problems, digestive problems, or lymphedema (swelling).
**Emotional and social:**
- Psychological burden of the diagnosis, uncertainty about the future.
- Possible loss of work income or career opportunities.
- Changes in relationships and sexuality.
- For some: fear of metastasis to other organs.
**Practical:**
- Regular medical appointments scheduled; sometimes travel requirements.
- Possible need for home care for physical care.
- Financial consequences of medical care and possible loss of income.
Nevertheless, many patients, especially with modern treatments, can still live for years with reasonable quality of life. Many hospitals offer support through social work, psychological counseling, and support groups.
Outlook
The prognosis for metastatic melanoma is difficult to express in a single number, because it depends heavily on multiple factors: where the cancer is located, whether certain genetic mutations are present (e.g. BRAF), how well the immune system responds, and which treatments are available.
**Historical perspective:**
A few decades ago, metastatic melanoma was a very serious diagnosis with median survival times of months. This has changed dramatically.
**Current situation:**
With modern immunotherapies (such as checkpoint inhibitors) and targeted therapies (targeting specific mutations), many patients with metastatic melanoma can now live for years. Some patients have already survived more than 5-10 years without their cancer actively growing. Five-year survival percentages for metastatic melanoma are between 20-40% in large regions, depending on where metastases are located and whether certain favorable genetic factors are present—but these are population figures and say nothing about your individual situation.
**Opportunities and limitations:**
- Some patients achieve *complete remission* (all cancer disappears); others achieve long-term stable disease (cancer does not progress further).
- In others, the disease progresses despite treatment. However, this is not always the end: doctors can then try other treatments.
- Research into immunology, targeted therapies and combination treatments continues. New possibilities are regularly added.
Given the rapid progress in melanoma research, individual prognoses are difficult to determine in advance. Much depends on how your specific melanoma responds to treatment.
Frequently asked questions
**Can melanoma be cured?**
When melanoma remains local (only in the skin), cure rates are very good, especially with early detection and surgical treatment. With metastatic melanoma, complete cure is rare, but long periods of disease stabilization or even remission (disappearance of all signs of cancer) are possible with modern treatments. Some doctors prefer to speak of "chronic disease" that you can learn to live with.
**What causes metastasis and can it be prevented?**
Metastasis occurs when cancer cells spread throughout the body. It is difficult to prevent completely once melanoma has undergone genetic changes that make invasion possible. However: early detection and treatment of melanoma before it metastasizes significantly reduces the risk. This is why self-examination of the skin and regular dermatologist check-ups are important.
**What treatments are available?**
This varies depending on the situation. Options include: surgery (removal of metastases), immunotherapy (which helps your own immune system attack cancer), targeted therapy (medications aimed at specific mutations in the tumor), radiation, and sometimes combinations. Your own doctor will determine which best suits your condition.
**How quickly does metastatic melanoma grow?**
This varies greatly from person to person. Some melanomas grow slowly and stably, others much more rapidly. This depends on the genetic properties of your specific cancer, the location of metastases, and how well your immune system responds. Your doctor can better estimate how it will progress in your case based on examination and monitoring.
---
_This information never replaces a doctor's judgment. Always discuss your situation with your own healthcare provider._