Overview
Melanoma is the most dangerous form of skin cancer in specialised cells called melanocytes. Melanocytes secrete excess melanin in patches, which leads to the disease manifesting itself in the form of blackish or brownish patches. Thus the condition is known as "black tumour". However, it can also be pink, red, purple or skin-coloured. It proliferates quickly and can spread to any organ.
About 30% of melanomas also start as moles, changing their form as the condition progresses. The moles range from 1/4 inch (about 6 millimetres) in diameter. However, many people with no risk factor may also have moles in their bodies. This is not a reason to panic. If you get moles very frequently and have existing risk factors, you can get yourself checked regularly to prevent severe cases. 99% of cases of melanoma can be cured if caught in the earliest stages.
Melanoma Cancer Causes
One of the major causes of melanoma is overexposure to sunlight. Sunburns are caused among younger people due to excess ultraviolet (UV)-light exposure, which leads to 86% cases of melanomas.
Excess UV exposure tends to damage the cell’s DNA irreversibly, leading to crucial gene mutations that may cause unrestrained growth and division of cells.
Another source of UV radiation is tanning beds, which have also been referred to as carcinogens (cancer-causing) agents by the World Health Organization (WHO).
Different Stages/Types of Melanoma Cancer
The moles in melanomas can be of different types and can be categorised as per their shape/orientation, and can be classified as ABCDE,
- A stands for an asymmetrical shape with irregular borders or two very different-looking halves.
- B stands for borders like irregular, notched or scalloped
- C stands for changes in colour patterns
- D stands for diameters larger than 1/4 inch (about 6millimetress).
- E is for evolving in size, colour or shape, or any other discomfort like itchiness or bleeding.
Melanoma is staged using the Roman numerals 0 through IV. Until stage I, melanomas can be treated and cured successfully. But higher stages are more challenging to treat, indicating spread towards or beyond lymph nodes (stage II and III respectively). Stage IV denotes the spread of cancer into internal organs like the lungs or liver.
Melanoma Cancer Preventions
Simple methods can act as preventive measures against skin cancer-
- using sunscreen with an appropriate sun protection factor (SPF)
- reducing exposure to carcinogens because of lifestyle or professional reasons
- whenever possible, keep oneself hydrated
- preventing exposure to the intense sun rays by using appropriate clothing
Melanoma Cancer Diagnosis
- Physical exam: The doctor normally conducts a thorough medical check and collects family history and past medical records.
- Biopsy: Analyzing a specimen from the skin (mole) to conduct specialised histological examinations in the laboratory. It can be done in different ways and can involve on-site inspection and can be done after scalping out a thin section from the mole/blackened skin patch.
A common technique for doing biopsies is punched biopsy. It is conducted with a circular blade pressed into the skin around the suspicious mole.
Following the primary examination, the cancer is staged using a combination of techniques. These include determining the thickness of the sample under the microscope and assessing the spread of the melanoma to the lymph nodes. If there is a spread towards the lymph node, a specialist conducts a sentinel node biopsy, using a dye that spreads to the lymph nodes from the site of the excisional biopsy.
Imaging tests including X-rays, CT scans and positron emission tomography (PET) scans are used for further examination in case there is a risk of advanced disease that has spread to other organs (metastasis). One may also find ulcerated open sore in the skin.
Melanoma Cancer Treatment
Treatment for early-stage melanomas usually includes surgery. Once detected in the early stages, melanomas can be removed either through biopsies or by removing the entire section of the skin along with a part of the surrounding skin to ensure no metastasis in future.
Treating melanomas that have spread beyond the skin include,
- Surgery to remove affected lymph nodes if the melanoma spreads towards lymph nodes
- Immunotherapy targets the immune system that can help fight the cancer-causing cells and boost the immune system.
- Targeted therapy focuses on specific weaknesses in cancer cells when cancer has spread towards or beyond the lymph nodes.
- Radiation therapy uses a high-powered energy beam to kill cancer cells, like X-rays and protons. It is typically given along with surgery for severe cases of melanoma.
- Chemotherapy targets specific cancer cells with the help of oral or intravenous injections. However, chemotherapy and radiotherapy have the inherent risk of killing normal cells along with cancer cells. Hence patients suffer from adverse effects during such therapies.
Melanoma Cancer Risk Factors
People can develop melanoma when they have one or more risk factors, including
- Previous medical history or genetic predisposition
- Lack of melanin pigmentation in the skin (mainly Caucasian or white-skinned people), those with freckles, blond or red hair and blue eyes
- Excess exposure to UV light and the sun owing to lifestyle and professional commitments or inhabiting tropical countries
- Abnormal appearance of moles in the body, especially by the age of 40 years
- A weak or compromised immune system
Certain atypical presentations of melanoma appear in people’s palms, soles, mouth, digestive tract, urinary tract, vagina, and nails.
Frequently Asked Questions
1. How fast can melanoma spread?
Melanoma can spread rapidly if it is not detected and treated early. The rate at which melanoma progresses can vary based on factors such as the tumour’s thickness, its location, and the individual’s immune system strength.
2. When is a melanoma too late?
At advanced stages, the success rate of melanoma starts declining. As the condition spreads beyond the skin and regional nodes, the cure rate drops sharply. However, modern immunotherapy and BRAF/MEK-targeted therapy can still help some patients with long-term survival.
3. How common is melanoma in Mumbai?
Melanoma is a less common type of skin cancer, but its incidence has been increasing globally, including in Mumbai. The exact prevalence of melanoma in Mumbai is not available and it is advisable to consult with dermatologists or oncologists in the city for more specific information.
4. What is the prognosis for melanoma in Mumbai?
The outlook for melanoma is influenced by several factors, including the cancer’s stage at the time of diagnosis, its thickness and depth of the tumour, its location, and the individual's overall health. Early detection and treatment significantly improve the prognosis. Mumbai has experienced healthcare professionals who can provide personalised prognosis information based on individual cases.
5. How can I protect myself from melanoma in Mumbai?
To reduce the risk of melanoma, it is essential to take measures against excessive sun exposure. This includes avoiding daylight during peak sunlight hours, wearing protective clothing such as long-sleeved shirts and wide-brimmed hats, using broad-spectrum sunscreen with a high SPF, and refraining from using tanning beds or sunlamps. Regular self-examination of the skin and routine dermatologist check-ups are also recommended for early detection.
6. Can touching melanoma spread it?
No, touching melanoma does not spread it, nor cancer is contagious. Melanoma is primarily spread through the bloodstream and lymphatic system.
7. Do you feel sick with melanoma?
In the early stages of melanoma, there may be no symptoms or only mild symptoms, such as changes in the colour or appearance of a mole. However, as the cancer progresses and spreads, more advanced symptoms may develop. The symptoms may differ depending on where the cancer is located and how advanced it is.
Related Blogs:
- When is Itchy Skin a Sign of Cancer?
- 10 Cancer Symptoms That Women Should not Ignore
- What are 10 Ways to Prevent Cancer?
- Cancer Prevention: Early Diagnosis, Screening, Stages & Treatment
- Oncologist: Know Everything About Your Cancer Doctor
- Radiation Therapy for Cancer: How Does It Work?
- Radiation Oncology Therapy: How Radiation Therapy Is Used for Cancer Treatment
- Alternative Cancer Treatment in India: How Effective is it ?
- Function of Lymph Nodes
Other Conditions & Treatments
- Basal Cell Carcinoma Treatment
- Bile Duct Cancer Treatment
- Bladder Cancer Treatment
- Blood Cancer Treatment
- Bone Cancer Treatment
- Brain Cancer Treatment
- Brain Tumor Treatment
- Cancer Reconstructive Surgery Program
- Chordoma Treatment
- Chronic Myelogenous Leukemia (CML) Treatment
- Chronic Myeloid Leukemia (CML) Treatment
- Colon (Colorectal) Cancer Treatment
- Esophageal Cancer Treatment
- Gall Bladder Cancer Treatment
- Gastrointestinal Cancer Program
- Heart Cancer Treatment
- Hepatectomy
- HPB malignancies
- Laryngeal Cancer Treatment
- Liver Cancer Treatment
- Medulloblastoma Treatment
- Metastatic Cancer Treatment
- Mouth Cancer Treatment
- Nasopharyngeal Cancer Treatment
- Neck Dissection Treatment
- Oral Cancer Treatment
- Oropharyngeal Cancer Treatment
- Ovarian Cancer Treatment
- Pancreatic Cancer Treatment
- Patient and Family Counselling
- Prostate Cancer Treatment
- Radiotherapy For Cancer
- Rectal Cancer Treatment
- Retinoblastoma Treatment
- Rhabdomyosarcoma Treatment
- Sarcoma Cancer Treatment
- Technology for Cancer Care
- Thoracic & Lung Cancer Program
- Throat Cancer Treatment
- Vulvar Cancer Treatment