Collaboration is key to bridging the AYA cancer care divide

Survival gains among adolescents and young adults (AYAs) with cancer continue to lag behind outcomes for children and older adult patients. It’s a trend that spans decades, but clinicians and researchers are finally getting serious about trying to understand the underlying causes and are re-examining prevailing practices in an effort to address the discrepancies.

“This is a very heterogeneous group of disorders,” Rabi Hanna, MD, a pediatric hematologist and oncologist at Cleveland Clinic Children’s Hospital, Ohio, said in an interview. He’s specifically referring to the cancers that affect AYAs, who are broadly defined as patients aged 15 through 39 years. “A few cancers, such as [acute lymphoblastic leukemia], are more common in children, and others, such as breast cancer, are more common in adults. The biology may be different in the adolescent and young adult patients, which may lead to different outcomes.”

In addition, the psychosocial needs in this age group differ vastly from those in other groups. “Many of these patients are in college or have just started their families, so we have to pay more attention to [issues related to] financial toxicity and fertility, for example,” said Dr Hanna, who is the director of pediatric bone marrow transplantation at the clinic. (The term “financial toxicity” describes the cumulative negative impact of the high cost of care, lost work time, and delays in reaching educational and career goals on patients with cancer and their families.)

Another factor that likely contributes to the outcome disparities between AYAs and other populations with cancer is the relative lack of clinical trial involvement among AYAs.

A recent series of articles published in the journal Blood addressed these and other issues, among them, whether AYAs with acute lymphoblastic leukemia (ALL)¹ or aggressive B-cell non-Hodgkin lymphomas (NHLs) ² should be treated as children or adults; treatment strategies for those with acute myeloid leukemias (AMLs); ³ management of Hodgkin lymphoma;⁴ and psychosocial challenges and health-related quality of life (QoL) in AYAs with hematologic malignancies.⁵

In the introduction to the series, Jorge Cortes, MD, an assistant editor on the journal, wrote that hematologic malignancies in AYAs “represent a unique challenge because of their special biological features and distinctive therapeutic requirements, as well as the unique medical, social, and psychological characteristics of this patient population.”⁶

He noted, however, that “not much has been done to explore unique molecular and biological features of AYA hematologic malignancies. The discussion on the management of AYAs often centers on whether these patients should be treated in a pediatric setting or an adult setting, or with regimens designed for children or for adults,” noted Dr Cortes, professor and chair of the chronic myeloid leukemia section in the department of leukemia at the University of Texas MD Anderson Cancer Center, Houston.
 

Therapeutic options: pediatric or adult protocols?

In their article on ALL in AYAs, Nicolas Boissel, MD, and André Baruchel, MD, note that the use of “fully pediatric protocols” in patients aged 15 through 20 years is supported by findings from numerous studies. In young adults, evidence increasingly supports “pediatric-inspired or even fully pediatric approaches” because they have been shown to significantly improve outcomes, with long-term survival rates nearing 70%.¹ Patients in these age groups require specific programs that factor in access to care and to trials, an increased risk of acute toxicities, and treatment adherence, which can be particularly problematic in AYAs, they concluded.