Merkel cell carcinoma, unspecified digital illustration

Merkel cell carcinoma, unspecified Save

ICD-10 code: C4A.9

Chapter: Neoplasms

Merkel cell carcinoma, unspecified: Symptoms, causes, and treatment

Merkel cell carcinoma (MCC) is an aggressive type of skin cancer that develops in the Merkel cells, which are responsible for detecting touch in the skin. MCC is rare but can be deadly if not diagnosed and treated early. The cause of MCC is not fully understood, but it is believed to be linked to exposure to ultraviolet (UV) radiation, a weakened immune system, and the Merkel cell polyomavirus (MCV).


MCC typically appears as a painless, firm, shiny, red, or purple lump on the skin. The lump may grow rapidly and can be mistaken for a harmless cyst or pimple. MCC often occurs on sun-exposed areas of the skin, such as the face, neck, and arms, but it can also develop on other parts of the body.


The exact cause of MCC is unknown, but several risk factors have been identified. Exposure to UV radiation from the sun or tanning beds can damage the skin cells and increase the risk of MCC. People with a weakened immune system, such as organ transplant recipients or those with HIV, are also at higher risk. In addition, the Merkel cell polyomavirus (MCV) has been found in up to 80% of MCC tumors, although it is not clear how the virus contributes to the development of the cancer.


The treatment of MCC depends on the stage and location of the cancer, as well as the patient's overall health. Surgery is often the first line of treatment for early-stage MCC, and the goal is to remove the tumor with a wide margin of healthy tissue. In some cases, radiation therapy may be used to kill any remaining cancer cells. Chemotherapy may also be used for advanced MCC, but it is generally less effective than surgery or radiation.

  1. Prevention
  2. The best way to prevent MCC is to protect the skin from UV radiation. This includes wearing protective clothing, using sunscreen with an SPF of at least 30, and avoiding tanning beds. It is also important to maintain a healthy immune system by eating a balanced diet, getting enough sleep, and exercising regularly.

  3. Conclusion
  4. Merkel cell carcinoma, unspecified is a rare but potentially deadly form of skin cancer that can develop in anyone. Early detection and treatment are crucial for improving the chances of a successful outcome. If you notice any unusual lumps or lesions on your skin, consult your doctor or dermatologist right away.

Diagnosis Codes for Merkel cell carcinoma, unspecified | C4A.9