For more information from the National Cancer Institute about male breast cancer, see the following: Breast Cancer Home PageDrugs Approved for Breast CancerAdjuvant and Neoadjuvant Therapy for Breast CancerHormone Therapy for Breast CancerUnderstanding Cancer Series: Targeted Therapies (Advances in Targeted Therapies and Targeted Therapies for Breast Cancer)Targeted Cancer TherapiesGenetic Testing for Hereditary Cancer SyndromesBRCA1 and BRCA2: Cancer Risk and Genetic TestingFor general cancer information and other resources from the National Cancer Institute, see the following:What You Need to Know About™ CancerUnderstanding Cancer Series: CancerCancer StagingChemotherapy and You: Support for People With CancerRadiation Therapy and You: Support for People With CancerCoping with Cancer: Supportive and Palliative CareQuestions to Ask Your Doctor About CancerCancer LibraryInformation For Survivors/Caregivers/Advocates
The PDQ cancer information summaries are reviewed regularly and updated as new information becomes available. This section describes the latest changes made to this summary as of the date above.Mammography—Variables Associated with AccuracyAdded text to state that overall digital and film mammography had similar diagnostic accuracy.This summary is written and maintained by the PDQ Screening and Prevention Editorial Board, which is editorially independent of NCI. The summary reflects an independent review of the literature and does not represent a policy statement of NCI or NIH. More information about summary policies and the role of the PDQ Editorial Boards in maintaining the PDQ summaries can be found on the About This PDQ Summary and PDQ NCI's Comprehensive Cancer Database pages.
Purpose of This SummaryThis PDQ cancer information summary for health professionals provides comprehensive, peer-reviewed, evidence-based information about the treatment of breast cancer and pregnancy. It is intended as a resource to inform and assist clinicians who care for cancer patients. It does not provide formal guidelines or recommendations for making health care decisions.Reviewers and UpdatesThis summary is reviewed regularly and updated as necessary by the PDQ Adult Treatment Editorial Board, which is editorially independent of the National Cancer Institute (NCI). The summary reflects an independent review of the literature and does not represent a policy statement of NCI or the National Institutes of Health (NIH). Board members review recently published articles each month to determine whether an article should:be discussed at a meeting,be cited with text, orreplace or update an existing article that is already cited.Changes to the summaries are made through a consensus
Screening is looking for cancer before a person has any symptoms. This can help find cancer at an early stage. When abnormal tissue or cancer is found early,it may be easier to treat. By the time symptoms appear,cancer may have begun to spread. Scientists are trying to better understand which people are more likely to get certain types of cancer. They also study the things we do and the ...
BiasNumerous uncontrolled trials and retrospective series have documented the ability of mammography to diagnose small, early-stage breast cancers, which have a favorable clinical course. Although several trials also show better cancer-related survival in screened versus nonscreened women, a number of important biases may explain that finding:Lead-time bias: Survival time for a cancer found mammographically includes the time between detection and the time when the cancer would have been detected because of clinical symptoms, but this time is not included in the survival time of cancers found because of symptoms.Length bias: Mammography detects a cancer while it is preclinical, and preclinical durations vary. Cancers with longer preclinical durations are, by definition, present during more opportunities for discovery and therefore are more likely to be detected by screening; these cancers tend to be slow growing and to have better prognoses, irrespective of screening.Overdiagnosis
After breast cancer has been diagnosed, tests are done to find out if cancer cells have spread within the breast or to other parts of the body.After breast cancer has been diagnosed, tests are done to find out if cancer cells have spread within the breast or to other parts of the body. This process is called staging. The information gathered from the staging process determines the stage of the disease. It is important to know the stage in order to plan treatment. Breast cancer in men is staged the same as it is in women. The spread of cancer from the breast to lymph nodes and other parts of the body appears to be similar in men and women.The following tests and procedures may be used in the staging process:Sentinel lymph node biopsy: The removal of the sentinel lymph node during surgery. The sentinel lymph node is the first lymph node to receive lymphatic drainage from a tumor. It is the first lymph node the cancer is likely to spread to from the tumor. A radioactive substance and/or
Call 1-800-4-CANCERFor more information, U.S. residents may call the National Cancer Institute's (NCI's) Cancer Information Service toll-free at 1-800-4-CANCER (1-800-422-6237) Monday through Friday from 8:00 a.m. to 8:00 p.m., Eastern Time. A trained Cancer Information Specialist is available to answer your questions.Chat online The NCI's LiveHelp® online chat service provides Internet users with the ability to chat online with an Information Specialist. The service is available from 8:00 a.m. to 11:00 p.m. Eastern time, Monday through Friday. Information Specialists can help Internet users find information on NCI Web sites and answer questions about cancer. Write to usFor more information from the NCI, please write to this address:NCI Public Inquiries Office9609 Medical Center Dr. Room 2E532 MSC 9760Bethesda, MD 20892-9760Search the NCI Web siteThe NCI Web site provides online access to information on cancer, clinical trials, and other Web sites and organizations that offer support
This information is produced and provided by the National Cancer Institute (NCI). The information in this topic may have changed since it was written. For the most current information, contact the National Cancer Institute via the Internet web site at http://cancer.gov or call 1-800-4-CANCER.Breast Cancer Screening