higher rates of blood cancers (leukemia and non-Hodgkin lymphoma), prostate cancer and thyroid cancers (in females only).
For example, the rate of Kaposi sarcoma was 12 times higher in African-born black women than U.S.-born black women, the researchers found. Kaposi sarcoma is cancer that causes lesions in soft tissues.
However, the lung cancer rate for African-born black men was 30 times lower than for U.S.-born blacks. African-born men also had lower colon cancer rates.
The researchers also found that cancer rates varied by region of birth in Africa. For example, higher rates of liver cancer among males and of thyroid cancer in females were confined to those born in eastern Africa, while the higher rate of prostate cancer among men was limited to those born in western Africa.
Environmental, cultural, social and genetic factors may explain