Final answer:
Mammograms and physical examinations are key potential early detection methods for breast cancer. Hair samples are not used, and blood tests are not typically for early detection of this specific cancer. Routine screenings are advised for women aged 50 and older, and self-exams are useful for younger women.
Step-by-step explanation:
Potential early detection methods for breast cancer include mammograms, which can indicate the presence of a lump but cannot diagnose malignancy, and physical examinations or breast self-exams, which can help individuals become familiar with their own breast tissue and notice changes. Blood tests may be used for detection of cancer in general but are not typically used for early detection of breast cancer. Hair samples are not a recognized method for detecting breast cancer.
Routine screening mammograms are especially recommended for women aged 50 and older, as they can help to catch breast cancer early. Additional methods like MRI have been introduced to supplement mammograms in order to improve detection accuracy and reduce false positives. Furthermore, it's beneficial for young women to get in the habit of performing a monthly self-exam, although breast cancer is rare in teens, to detect any changes early on.