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NCI: Posted on Wednesday, October 05, 2011 6:11 PM
responsible for the rise in incidence of oropharyngeal squamous cell carcinoma (OPSCC), by 2020 HPV-positive OPSCC will likely surpass cervical cancer as the most common HPV-associated cancer in the United States. The findings were published online October 3 in the Journal of Clinical Oncology |
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National Breast Cancer Foundation, inc.: Posted on Monday, August 29, 2011 9:57 PM
Breast cancer type is categorized by whether it begins in the ducts or lobules, the organs responsible for breast milk production. Understanding the specific type of breast cancer can help you ask better questions and work with your physicians to get the best breast cancer treatments.
Ductal Carcinoma In-Situ (DCIS)
Infiltrating Ductal Carcinoma (IDC)
Medullary Carcinoma
Infiltrating Lobular Carcinoma (ILC)
Tubular Carcinoma
Mucinous Carcinoma (Colloid)
Inflammatory Breast Cancer (IBC) For more information on the types and |
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NCI: Posted on Tuesday, August 09, 2011 8:11 PM
A study of postmenopausal women has confirmed that higher breast density is associated with a greater risk of breast cancer and revealed that the tumors that do develop are more likely to be aggressive. The findings were published online July 27 in the Journal of the National Cancer Institute.Dense breast tissue, which has less fat and more glandular and connective tissue, is a known risk factor for breast cancer, and mammograms of dense breast tissue are often more difficult to read and interpret. |
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ACS: Posted on Monday, August 08, 2011 10:38 PM
Viruses with uncertain or unproven links to cancer in humans
Simian virus 40 (SV40) SV40is a virus that usually infects monkeys. Some polio vaccines prepared between 1955 and 1963, which were produced from monkey cells, were found to be contaminated with SV40.Some recent studies have raised the possibility that infection with SV40 might increase a person's risk of developing mesothelioma (a rare cancer of the lining of the lungs or abdomen), as well as some brain cancers, bone cancers, and lymphomas. |
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ACS: Posted on Sunday, August 07, 2011 4:39 PM
Human T-lymphotrophic virus-1 (HTLV-1)
HTLV-1 has been linked with a type of lymphocytic leukemia and non-Hodgkin lymphoma called adult T-cell leukemia/lymphoma (ATL). This cancer is found mostly in southern Japan, the Caribbean, Central Africa, parts of South America, and in some immigrant groups in the southeastern United States. In addition to ATL, the virus also causes a form of degenerative nerve disease called tropical spastic paraparesis (TSP), which is most common in Japan and in the Caribbean basin. |
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ACS: Posted on Friday, August 05, 2011 7:49 PM
Human herpes virus 8 (HHV-8)
HHV-8, also known as Kaposi sarcoma–associated herpes virus (KSHV), has been found in nearly all tumors in patients with Kaposi sarcoma (KS). KS is a rare, slow-growing cancer that often appears as reddish-purple or blue-brown tumors just underneath the skin. KS has been known to exist in central Africa and the Middle East for some time, but was rare in the United States until it started appearing in patients with AIDS in the early 1980s. The number of people with KS has dropped in the US since peaking in the early 1990s, most likely because of better treatment of HIV infection. |
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ACS: Posted on Thursday, August 04, 2011 5:26 PM
Hepatitis B virus (HBV) and hepatitis C virus (HCV)HBV and HCV
are 2 viruses that cause viral hepatitis, a type of liver infection. Other viruses can also cause hepatitis (hepatitis A virus, for example), but only HBV and HCV can cause long-term infections that increase a person's chance of developing liver cancer. In the United States, about 30% of liver cancers are linked to HBV or HCV infection. This number is much higher in certain other countries, where both the infections and liver cancer are much more common. |
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ACS: Posted on Wednesday, August 03, 2011 7:44 PM
Human immunodeficiency virus (HIV)HIV, the virus that causes acquired immune deficiency syndrome (AIDS), does not appear to cause cancers directly. But HIV infection increases a person's risk of getting several types of cancer, especially some linked to other viruses such as HHV-8 (see section below) and HPV.HIV is spread through intimate contact with blood, vaginal fluids, breast milk, or semen from an HIV-infected person. Known routes of spread include: - Unprotected sex (oral, vaginal, or anal) with an HIV-infected person
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ACS: Posted on Tuesday, August 02, 2011 5:49 PM
Viruses that could lead to cancer:
Viruses are very small organisms; most cannot even be seen with an ordinary microscope. They are made up of a small group of genes in the form of DNA or RNA surrounded by a protein coating. Viruses cannot reproduce on their own. They need to enter a living cell and "hijack" the cell's machinery to make more viruses. Some viruses do this by inserting their own DNA (or RNA) into that of the host cell. When the DNA or RNA affects the host cell's genes, it may push the cell toward becoming cancer. |
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ACS: Posted on Tuesday, August 02, 2011 4:49 PM
INFECTIOUS AGENTS AND CANCER:
Since the start of the 20th century, it has been known that certain infections play a role in cancer in animals. More recently, infection with certain viruses, bacteria, and parasites been recognized as a risk factor for several types of cancer in humans.Worldwide, infections are linked to about 15% to 20% of cancers. In the United States and other developed countries, less than 10% of all cancers are thought to be linked to infectious agents. In developing countries, infections can account for as many as 1 in 5 (20%) of all cancers. |
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