What is Merkel Cell Carcinoma?
Merkel cell carcinoma (MCC) is a rare and aggressive type of skin cancer that originates in the Merkel cells. Merkel cells are found at the base of the outermost layer of the skin and are associated with the sense of touch. MCC often appears as a firm, painless, red or violet nodule on the skin, most commonly on sun-exposed areas such as the face, neck, and arms. It tends to grow rapidly and can metastasize (spread) to other parts of the body, including lymph nodes and internal organs.
Merkel cell carcinoma typically presents as a single, painless, red or purple nodule that can grow quickly, and usually appears on sun-exposed areas but can develop anywhere on the body.
Risk Factors
Merkel cell carcinoma (MCC) is a rare and aggressive form of skin cancer. Several risk factors have been identified for developing MCC:
- Sun Exposure:
- Prolonged and intense exposure to ultraviolet (UV) radiation, including both natural sunlight and artificial sources like tanning beds, increases the risk of MCC. The cancer often occurs on sun-exposed areas of the skin.
- Weakened Immune System:
- Individuals with weakened immune systems are at higher risk. This includes people with HIV/AIDS, those who have undergone organ transplants and are on immunosuppressive drugs, and those with certain autoimmune diseases.
- Age:
- MCC is more common in older adults, typically those over the age of 50. The risk increases with age.
- Gender:
- Men are more likely to develop MCC than women.
- Fair Skin:
- People with fair skin, especially those who burn easily, are at a higher risk for MCC. This is similar to the risk pattern seen in other types of skin cancers.
- Merkel Cell Polyomavirus (MCV):
- The presence of the Merkel cell polyomavirus is strongly associated with MCC. Most people carry this virus without any problems, but in some cases, it can lead to cancer development.
- History of Other Cancers:
- Individuals who have had other types of cancers, particularly skin cancers like melanoma or squamous cell carcinoma, may have an increased risk of developing MCC.
- Chronic Skin Inflammation:
- Chronic inflammation or long-standing skin conditions can also elevate the risk.
Individuals with multiple risk factors or who notice unusual skin lesions should seek medical evaluation by a GW Cancer Center cutaneous oncologist. Early detection and appropriate treatment are crucial in managing Merkel cell carcinoma.
Merkel Cell Carcinoma Symptoms
Merkel cell carcinoma (MCC) is a rare and aggressive skin cancer, and it usually develops on areas of skin that are exposed to the sun, such as the face, ears, neck, scalp, shoulders, and back. Here are some common symptoms associated with Merkel cell carcinoma:
- Firm, Painless Nodule: The most common symptom is a firm, shiny nodule or bump on the skin. It is usually painless and can be red, pink, purple, or skin-colored.
- Rapid Growth: The nodule tends to grow quickly, often over a period of weeks to months.
- Location: MCC typically appears on sun-exposed areas of the skin, such as the face, neck, arms, and legs. However, it can occur anywhere on the body.
- Ulceration: The nodule may sometimes break open and form an ulcer.
- Lymph Node Involvement: Enlarged lymph nodes near the primary lesion can occur if the cancer has spread.
- Metastasis: In advanced cases, MCC can spread to other parts of the body, leading to symptoms related to the affected organs, such as difficulty breathing (if it spreads to the lungs) or jaundice (if it spreads to the liver).
Early detection and treatment of Merkel cell carcinoma are crucial to prevent metastasizing to other parts of the body. If you or someone you know experiences these symptoms, especially a new growth or a change in an existing skin lesion, it is important to consult a dermatologist for a proper diagnosis as soon as possible. At the GW Cancer Center, you’ll be seen by doctors and surgeons who rank among the top cutaneous oncology experts in the Washington, DC, region.