Which cancer screening is recommended annually for women starting at age 21?

• A. Mammogram
• B. Colonoscopy
• C. Pap smear
• D. Breast ultrasound

Answer: (C)

The recommended cancer screening annually for women starting at age 21 is the Pap smear. This test is essential for detecting precursors to cervical cancer by identifying abnormal changes in the cells of the cervix. The guidelines specify that beginning at age 21, women should undergo Pap testing every three years until they reach the age of 29. From ages 30 to 65, women can choose to continue with Pap tests every three years or opt for a combination of Pap testing and HPV (human papillomavirus) testing every five years.

Mammograms are typically recommended starting at age 40 for breast cancer screening, while colonoscopies are suggested for colorectal cancer screening beginning at age 45. Breast ultrasounds are generally not a primary screening method; they are often used as a supplemental tool alongside mammography or for further evaluation of breast abnormalities. This context clarifies why the Pap smear is the correct choice for annual screening starting at age 21.