HOW RELIABLE ARE MAMMOGRAMS ?

http://www.nationalbreastcancer.org/diagnostic-mammogram

The ability of a mammogram to detect breast cancer may depend on the size of the tumor, the density of the breast tissue, and the skill of the radiologist administering and reading the mammogram. Mammography is less likely to reveal breast tumors in women younger than 50 years than in older women. This may be because younger women have denser breast tissue that appears white on a mammogram. Likewise, a tumor appears white on a mammogram, making it hard to detect.

我想亚裔女性乳房的density高， 误差率会比average 20%上下要高。