Colorectal Cancer

Update : Cancer disparities: Colorectal cancer in African Americans

Relevance: Medium-High

Strength of Science: High

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Most relevant for: African Americans concerned about colorectal cancer

The American Association for Cancer Research (AACR) released a 2020 report about cancer disparities among racial and ethnic groups in the United States. In this XRAY review, we highlight data from the report about the burden of colorectal cancer in African Americans, who have the highest rates of diagnosis and death related to the disease among all racial and ethnic groups. (Posted 4/27/21)

Este artículo está disponible en español.

Study : Expanded access to Medicaid coverage under the Affordable Care Act is linked to reduced cancer mortality

Relevance: High

Strength of Science: Medium-High

Research Timeline: Post Approval

Most relevant for: People with breast, colorectal or lung cancer.

In 2014 the Affordable Care Act expanded Medicaid coverage. How did this affect healthcare for cancer patients? This study shows that deaths from breast, colorectal and lung cancer are lower in states that chose to expand Medicaid compared to states that did not. Early diagnosis was linked to lower death rates. This suggests that increased healthcare access may lead to earlier cancer detection and better outcomes, including lower mortality. (3/31/2021)

Este artículo está disponible en español.

Study : Body Mass Index (BMI) may affect how well aspirin use protects against colorectal and ovarian cancer

Relevance: Medium-High

Strength of Science: Medium-High

Research Timeline: Post Approval

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Most relevant for: People concerned about their risk of colorectal or ovarian cancer.

This study looked at the impact of daily aspirin use on the risk for many types of cancers and whether this effect can be modified by risk factors such as obesity, smoking, physical inactivity or a family history of cancer. Daily aspirin use: 

• lowered the risk for colorectal cancer, but this effect was lost as Body Mass Index (BMI) increased.
• lowered the risk of ovarian cancer risk among obese women.
• offered little or no protection against breast, endometrial or advanced prostate cancer.

(posted 3/19/21)

Este artículo está disponible en español.

Study : Immunotherapy drug Keytruda received FDA approval and showed benefit for treatment of colorectal cancer

Relevance: High

Strength of Science: High

Research Timeline: Post Approval

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Most relevant for: People with advanced colorectal cancer and a type of biomarker called MSI-High (MSI-H)

In June 2020, the FDA approved Keytruda (pembrolizumab) as an initial therapy for advanced colorectal cancer. This approval was based on the results from the KEYNOTE-177 study. In this study, Keytruda was more successful than chemotherapy in delaying progression of certain types of colorectal cancers. (11/25/20)

Study : Cancer risk associated with inherited mutations in Lynch syndrome genes

Relevance: Medium-High

Strength of Science: Medium-High

Research Timeline: Human Research

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Most relevant for: People with Lynch syndrome mutations

Lynch syndrome is the most common inherited cause of cancer affecting about 1 in 300 people. People with Lynch syndrome have an increased risk of colorectal endometrial and other cancers. A large study followed people with mutations in the Lynch syndrome genes MLH1, MSH2, MSH6 and PMS2 to determine the risk of other types of cancer. (2/21/20)

Study : LGBTQ patients recommend improvements for their cancer care

Relevance: Medium-High

Strength of Science: High

Research Timeline: Post Approval

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Most relevant for: LGBTQ cancer patients and their healthcare providers.

Very little research has focused on the cancer care experiences of lesbian, gay, bisexual, transgender and queer (LGBTQ) people. This study looks at recommendations from the LGBTQ community for improving their cancer care. (6/20/19)

Article : The importance of racial diversity in clinical trials

Relevance: High

Quality of Writing: High

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Most relevant for: People who are a member of a racial or ethnic minority group

This article by journalists Caroline Chen and Riley Wong looks at racial disparities between participation in clinical trials and the population of people with cancer. (11/6/18)

Este artículo está disponible en español.

Study : Evaluation of some direct-to-consumer genetic testing reveals inaccuracies and misinterpretations

Relevance: Medium

Strength of Science: Medium

Research Timeline: Human Research

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Most relevant for: People who are considering or have had direct-to-consumer testing

A clinical genetic testing laboratory examined results from direct-to-consumer genetic testing ordered directly by patients. They found many instances of false positives—reported mutations that were not actually present—and in some cases, reports of variants that "increased risk," but were actually benign. This study emphasized the importance of involving genetics experts in the interpretation of genetic test results. (6/28/18)

Study : Mutations in Lynch syndrome genes MSH6 and PMS2 may be associated with breast cancer

Relevance: Medium-High

Strength of Science: Medium-High

Research Timeline: Human Research

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Most relevant for: Women with an MSH6 or PMS2 mutation

Some women with mutations in MSH6 and PMS2, two Lynch syndrome genes, may have a modest (2 to 3-fold) increased risk for breast cancer. (6/14/18 updated 09/25/19)

Study : Cancer “vaccine” injected directly into tumors works in mice

Relevance: Medium-Low

Strength of Science: Medium-Low

Research Timeline: Animal Studies

Most relevant for: People with advanced cancers

Immunotherapy is treatment that uses the immune system to fight cancer. Still in its infancy, it is a promising therapy that is changing how certain cancers are treated. A new study reports that tumors in lab mice were eliminated when they were injected with two immune system-enhancing agents. This new approach is called in situ (at the original site) vaccination because the injections are given directly into the tumors. It worked on several different types of mouse tumors, including lymphomas and breast tumors. This approach may be safer than conventional immunotherapy because it uses very low doses of the agents and it does not require tumors to have particular markers. (02/23/18)