C4A.8

Clinical Causes: Excessive exposure to ultraviolet (UV) radiation from sunlight or tanning beds Weakened immune system due to conditions such as HIV/AIDS, organ transplantation, or immunosuppressive medications Advanced age, particularly in individuals over 50 years old Fair skin that is more susceptible to UV damage Previous skin injuries or scars that may have been exposed to UV radiation History of other skin cancers

Key Symptoms: Fast-growing, firm, and painless skin nodules or lumps Found commonly on sun-exposed areas such as the face, neck, or arms Lesions that may appear as shiny, bluish, or red bumps Possible ulceration or bleeding from the affected area Multiple lesions in overlapping sites can be present simultaneously Lymph node swelling near the primary or overlapping sites

Diagnosis Path: Diagnosis of Merkel cell carcinoma usually involves a thorough skin examination, followed by a biopsy of the suspicious lesion. Imaging tests such as CT scans, MRI, or PET scans may be ordered to assess whether the cancer has spread. Histopathological examination confirms the diagnosis, showing characteristic cell features. In cases with overlapping sites, multiple biopsies may be necessary to understand the extent and spread of the disease.

Treatment Protocols: Treatment options typically involve a combination of approaches tailored to the severity and spread of the cancer. Common treatments include surgical removal of the primary tumors, sometimes along with lymph node dissection if there’s regional spread. Radiation therapy may be used to target residual cancer cells or to treat inoperable areas. Immunotherapy, which boosts the body's immune response, has shown promise in managing advanced cases. In some instances, chemotherapy may be considered, particularly if the cancer has metastasized. Multidisciplinary care is often required for optimal management.