Basal-cell carcinoma
In the United States approximately 3 out of 10 caucasians develop a basal-cell carcinoma during their lifetime. This tumor accounts for approximately 70% of non-melanoma skin cancers. In 80 percent of all cases, basal-cell carcinoma affects the skin of head and neck. Furthermore, there appears to be an increase in the incidence of basal-cell cancer of the trunk in recent years.
BRCA mutation
Cancer of the colon is approximately as common in both men and women in the developed world as breast cancer is among average-risk women, with about 6% of people being diagnosed with it, usually over the age of 50. Like sporadic prostate cancer, it is a multifactorial disease, and is affected by age, diet, and similar factors. "BRCA" mutation carriers have a higher than average risk of this common cancer, but the risk is not as high as in some other hereditary cancers. The risk might be as high as four times normal in some "BRCA1" families, and double the normal risk among "BRCA2" carriers. Like pancreatic cancer, it may be that only some "BRCA" mutations or some "BRCA" families have the extra risk; unlike other "BRCA"-caused cancers, it does not appear at an earlier age than usual. Normal colon cancer screening is usually recommended to "BRCA" mutation carriers.