Use of screening tests to identify cancers before they cause symptoms can lead to earlier therapy and may improve outcomes. Screening tests for some common cancers are reviewed below.

In the absence of randomized studies demonstrating an impact on mortality, the US Preventive Services Task Force (USPSTF) has found the evidence insufficient to recommend a routine whole-body examination for melanoma and other skin cancers.

Direct-to-consumer advertisements are urging women to be tested for mutations in BRCA1 and BRCA2 genes, which are the most common known causes of an inherited predisposition to breast and ovarian cancer. Clinically important BRCA mutations have been found in about 2% of Ashkenazi Jewish women, and are estimated to occur in about 1 in 300 to 500 women in the general non-Jewish US population. The prevalence appears to be lower in non-whites.

Most colorectal cancers arise from localized adenomatous polyps in a process that may take 10 years or more. Early detection and removal of a precancerous colonic lesion (polyp) can prevent cancer from developing.

The US Preventive Services Task Force (USPSTF) has recently concluded that available evidence is insufficient to assess the balance between potential benefits and harms of using the prostate-specific antigen (PSA) to screen men < 75 years old for prostate cancer and has recommended against screening men > 75 years old.

Most patients with lung cancer present with advanced disease, and fewer than 20% live for five years after diagnosis. Earlier detection of lung cancer, when it is potentially resectable, might improve survival. Recent studies have led some radiology centers to promote spiral computed tomography (CT), which involves much less exposure to radiation than standard CT, as a screening tool for lung cancer.

The incidence of oral cancer appears to be increasing, especially in younger patients. Risk factors include use of tobacco and alcohol, and exposure to human papillomavirus. ViziLite Plus (Zila Pharmaceuticals) is a combination device that uses fluorescent light and toluidine blue tissue staining to help dentists identify abnormal changes in the mucous membranes of the oral cavity. Originally developed for detecting abnormal growths on the uterine cervix, in 2001 it received FDA clearance for "identification, evaluation, and monitoring of oral mucosal abnormalities in a patient population at...

Conflicting recommendations on when to screen for breast cancer are problematic for healthcare providers. The recent recommendation by the US Preventive Services Task Force (USPSTF) against routine screening mammography for women 40-49 years old conflicts with recommendations made by other organizations such as the American Cancer Society and earlier recommendations made by the USPSTF in 2002.

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The FDA has approved Cologuard (Exact Sciences), a stool DNA test, to screen average-risk adults ≥50 years old for colorectal cancer.

The FDA has approved Cologuard Plus (Exact Sciences), a new at-home multitarget stool DNA test, for colorectal cancer (CRC) screening in average-risk adults ≥45 years old. Cologuard, the first FDA-approved multitarget stool DNA test, has been available since 2014.