Duke Cancer Institute’s Gita Suneja, MD, MSHP, has received a five-year National Cancer Institute Mentored Clinical Scientist Research Career Development Award (K08) for her project “Cancer Treatment Disparities in the HIV Population: Exploring the Impact of HIV on Physician and Patient Decision-Making.”
The NCI award, granted in September 2018, is designed to provide salary support and protected time to clinician-scientists early in their career.
Suneja joined Duke in December 2016 as an associate professor of radiation oncology, associate research professor of global health policy, and radiation oncologist specializing in breast and gynecological cancers.
Most of Suneja’s research is focused on disparities in cancer care access and patient outcomes; particularly in HIV-infected patients in the U.S. and Botswana.
“You can have the best cancer treatment, but when it doesn’t certain segments of the population, that’s a problem,” she said.
Suneja’s interest in HIV in the U.S. came out of her clinical experience during her residency training at the University of Pennsylvania.
“While seeing HIV-infected cancer patients, I realized that patients with HIV were often excluded from cancer clinical trials, therefore the evidence we base our decision-making on didn’t apply to them; because of that it’s possible to undertreat or inappropriately treat these patients,” said Suneja. “If that was the case at an academic institution with access to all the available data, I wondered if these patients were undertreated in other settings across the U.S.”
She found that they were. In fact, she discovered that for most cancers, Americans living with HIV are two-to-three times more likely to receive no cancer treatment compared to uninfected people — this despite most cancer treatment courses being safe and effective in a population that’s now living much longer due to game-changing advances in antiretroviral therapy.
“Cancer survival is significantly worse in people living with HIV, in part because they frequently do not receive appropriate cancer treatment,” said Suneja. “Cancer is a leading cause of death in people with HIV, so improving cancer treatment in this population is urgent.”
A Sense of Urgency
The human immunodeficiency virus (HIV) is spread through sexual contact or blood, or from mother to child during pregnancy, childbirth or breast-feeding. Without antiretroviral therapy, it takes around ten years before the immune system is weakened to the point where someone with HIV develops AIDS—acquired immunodeficiency syndrome. Modern therapies, however, can dramatically slow the progression of the disease and hold AIDS at bay for decades. Today, most Americans with HIV don’t develop AIDS.
“There’s a perception that HIV is a fatal illness, when that’s not the reality of modern HIV medicine,” explained Suneja. “The survival rate of people living with HIV now approaches that of uninfected people. It’s really become a chronic disease.”
According to NCCN, an estimated 7,760 Americans living with HIV were diagnosed with cancer in 2010, representing an approximately 50 percent higher rate of cancer than the general population.
Of these cancers, the majority were AIDS-defining cancers — with non-Hodkgin lymphoma and Kaposi sarcoma among the most common. (Cervical cancer, another AIDS-defining cancer represents a lower proportion of cases, mainly because the HIV population in America is predominantly male.) The most common non-AIDS-defining cancer was lung cancer — representing about 10 to 15 percent of cancers among people with HIV — followed by anal cancer and prostate cancer.
As people with HIV are living longer, the incidence of non-AIDS-defining cancers in this population is becoming more prevalent, according to Eric Engels, MD, MPH, chief of the Infections and Immunoepidemiology Branch in the Division of Cancer Epidemiology & Genetics at NCI and Suneja’s NCI collaborator on her K08 award.
Engels estimates that by 2030 prostate and lung cancers will be the most common cancers in people with HIV. (Smoking, a risk factor for lung cancer, is much more common in the HIV population than the general population and prostate cancer is the leading cancer diagnosed in U.S. men, overall, each year.)
Suneja and Engels, with other colleagues at the University of Pennsylvania, were the first to show a difference in cancer treatment of HIV-infected patients vs. non-HIV-infected patients. Their seminal study Disparities in the treatment and outcomes of lung cancer among HIV-infected individuals (published in the journal AIDS in 2013), focused on Texas, where they had access to both the Texas Cancer Registry and the Texas enhanced HIV/AIDS Reporting System. The researchers concluded that HIV-infected non-small cell lung cancer patients were less frequently treated for lung cancer than HIV-uninfected patients, which may have affected survival.
After that, Suneja continued to work with Engels — looking at more states using the HIVAIDS Cancer Match Study as well as other large datasets like Medicare claims data, the National Cancer Database, and the NCI SEER (Surveillance, Epidemiology, and End Results) database. These database studies included both AIDS-defining and non-AIDS-defining cancers, including non-Hodgkin lymphoma and cervical cancer. (Because of the rarity of Kaposi’s sarcoma in uninfected people, they did not include that cancer in their treatment patterns studies.)
In 2015, Suneja, Engels and other colleagues published findings from a national survey of 500 randomly selected medical and radiation oncologists indicating that HIV-infected individuals with non-AIDS-defining cancers were less likely to receive cancer treatment compared with uninfected individuals.
Sixty-nine percent of respondents felt that “available cancer management guidelines were insufficient for the care of HIV-infected patients with cancer;” 45 percent never or rarely discussed their cancer management plan with an HIV specialist; 20 percent of providers were not comfortable discussing cancer treatment adverse effects; and 15 percent were uncomfortable discussing prognosis with their HIV-infected patients with cancer.
Study authors concluded that “policy change, provider education, and multidisciplinary collaboration” are needed to improve access to cancer treatment.
In February 2018, the National Comprehensive Cancer Network answered that call, releasing new guidelines co-authored by Suneja, intended to help make sure people living with HIV who are diagnosed with cancer receive safe, necessary treatment. MORE