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RISK FACTOR Of KAPOSI SARCOMA CANCER, TREATMENT Of KAPOSI SARCOMA CANCER The risk factors for KS are not well understood, but certain risk factors have been identified. These include: Age: The average age at diagnosis is 66 years; however, it can occur at any age and may occur in childhood or adulthood. Race/ethnicity: Most cases occur in African-Americans and Hispanics, but other ethnicities are affected as well (e.g., Asian-Americans) Infection with HHV-8: At least 90% of patients have antibodies against HHV-8, although some people do not test positive for antibodies even though they are infected with HHV-8. This suggests that there are some individuals who don’t show any symptoms of having been infected with HHV-8 Kaposi sarcoma is more common in men than women, although both genders can get it. It’s more common in people between 30 and 50 years old, although it can affect anyone at any age. It is most common in people who have had prolonged exposure to the sun or ultraviolet (UV) light. It can also develop in people with no known risk factors, however.