early detection of cancer

Cervical cancer screening is one of the most significant public health accomplishments of the 20th century. Over the last 50 years, incidence and mortality rates from cervical cancer in the US have decreased by more than 50%1 because of widespread use of the Papanicolaou test and later adoption of high-risk human papillomavirus (hrHPV) testing.

Regular screening is critical in detecting disease because women with precancerous cervical intraepithelial neoplasia or early-stage cervical cancer are often asymptomatic. When detected early, 5-year cervical cancer survival is higher than 90%.1 Yet more than half of all cervical cancer diagnoses are made beyond an early stage; 37% when cancer has spread regionally to local lymph nodes and 15% when there are distant cancer metastases. Five-year survival is just 20% for women diagnosed with metastatic disease.1

Cervical cytology (Papanicolaou test) and hrHPV tests are highly effective in detecting early, more treatable disease; however, these modalities are only beneficial for women who undergo recommended screening. Unfortunately, about half of all women diagnosed with cervical cancer have never been screened or are not up-to-date on screening,2 and these women are more likely to present with regional or distant metastatic disease. Overall, approximately 1 in 4 women in the US are not up-to-date on cervical cancer screening.3 Women living in poverty or having fewer years of formal education have even lower screening rates. The direct link between screening and survival illustrates a clear and urgent need to improve cervical cancer screening rates in the US; new self-collection options approved by the US Food and Drug Administration (FDA) provide an opportunity to do so.

This JAMA Patient Page describes Lynch syndrome, its risk factors and diagnosis, and its association with colorectal cancer and other specific cancers.

Importance: Among all US women, breast cancer is the second most common cancer and the second most common cause of cancer death. In 2023, an estimated 43 170 women died of breast cancer. Non-Hispanic White women have the highest incidence of breast cancer and non-Hispanic Black women have the highest mortality rate.

Objective: The USPSTF commissioned a systematic review to evaluate the comparative effectiveness of different mammography-based breast cancer screening strategies by age to start and stop screening, screening interval, modality, use of supplemental imaging, or personalization of screening for breast cancer on the incidence of and progression to advanced breast cancer, breast cancer morbidity, and breast cancer-specific or all-cause mortality, and collaborative modeling studies to complement the evidence from the review.

Population: Cisgender women and all other persons assigned female at birth aged 40 years or older at average risk of breast cancer.

Evidence assessment: The USPSTF concludes with moderate certainty that biennial screening mammography in women aged 40 to 74 years has a moderate net benefit. The USPSTF concludes that the evidence is insufficient to determine the balance of benefits and harms of screening mammography in women 75 years or older and the balance of benefits and harms of supplemental screening for breast cancer with breast ultrasound or magnetic resonance imaging (MRI), regardless of breast density.

Recommendation: The USPSTF recommends biennial screening mammography for women aged 40 to 74 years. (B recommendation) The USPSTF concludes that the current evidence is insufficient to assess the balance of benefits and harms of screening mammography in women 75 years or older. (I statement) The USPSTF concludes that the current evidence is insufficient to assess the balance of benefits and harms of supplemental screening for breast cancer using breast ultrasonography or MRI in women identified to have dense breasts on an otherwise negative screening mammogram. (I statement).

The purpose of the American Cancer Society/American Society of Clinical Oncology Breast Cancer Survivorship Care Guideline is to provide recommendations to assist primary care and other clinicians in the care of female adult survivors of breast cancer. A systematic review of the literature was conducted using PubMed through April 2015. A multidisciplinary expert workgroup with expertise in primary care, gynecology, surgical oncology, medical oncology, radiation oncology, and nursing was formed and tasked with drafting the Breast Cancer Survivorship Care Guideline. A total of 1073 articles met inclusion criteria; and, after full text review, 237 were included as the evidence base. Patients should undergo regular surveillance for breast cancer recurrence, including evaluation with a cancer-related history and physical examination, and should be screened for new primary breast cancer. Data do not support performing routine laboratory tests or imaging tests in asymptomatic patients to evaluate for breast cancer recurrence. Primary care clinicians should counsel patients about the importance of maintaining a healthy lifestyle, monitor for post-treatment symptoms that can adversely affect quality of life, and monitor for adherence to endocrine therapy. Recommendations provided in this guideline are based on current evidence in the literature and expert consensus opinion. Most of the evidence is not sufficient to warrant a strong evidence-based recommendation. Recommendations on surveillance for breast cancer recurrence, screening for second primary cancers, assessment and management of physical and psychosocial long-term and late effects of breast cancer and its treatment, health promotion, and care coordination/practice implications are made. CA Cancer J Clin 2016;43–73. © 2015 American Cancer Society.