Childhood Leukemia Survivors Struggle With Long-Term Comorbidities

	Tweet

Survival rates of childhood cancers, especially leukemia, have improved greatly in the past three decades, but survivors of this disease still seem to face many health and lifestyle challenges as young adults. Depending on the extent of their disease and treatment methods, many continue to struggle with one or more life-long medical conditions and decreased quality of life, according to a study prepublished online in Blood, the official journal of the American Society of Hematology.

Acute lymphoblastic leukemia (ALL) is the most common childhood leukemia and childhood cancer overall, accounting for about one-fourth of all pediatric cancers. Each year about 3,000 new cases are diagnosed in the U.S., though recently the cure rate has improved and the estimated five-year survival rate is now greater than 80 percent. While therapies for the disease are generally very effective, previous studies have shown that survivors still face challenges with ongoing chronic health conditions and overall quality of life.

The population evaluated in this study was part of the Childhood Cancer Survivor Study (CCSS), a National Cancer Institute (NCI) funded, multi-institutional cohort, the largest comprehensive research cohort of long-term childhood cancer survivors. Some 4,151 ALL survivors completed questionnaires to evaluate rates of comorbidities, multiple chronic conditions, and other health markers, as well as lifestyle factors including marriage, education, employment and health insurance coverage. For comparison, the study also evaluated the survivors’ siblings with similar questionnaires. 

In addition to self-reported effects up to 25 years post-diagnosis, the study also assessed the treatment regimens and disease relapse to understand how these factors might have long-term effects on survivors’ quality of life. Specifically, the team compared patients who had received radiation therapy as part of their ALL therapy regimen (62 percent) with those who did not, as well as with those with or without recurrences within the first five years after original diagnosis.

“Children diagnosed with ALL are exposed to significant therapeutic intervention very early in their lives,” said lead study author Rajen Mody, M.D., M.S., assistant professor of pediatrics at the University of Michigan Medical School. “Looking at such a large cohort of long-term survivors, we sought to understand the real latent effects of aggressive cancer treatments and what specific factors could affect various health outcomes and quality of life by adulthood.”

The analysis found that for the five-year ALL survivors, the survival after 25 years was 87 percent. The treatment method as well as whether the cancer had relapsed in the first five years seemed to affect survival. Survivors treated with radiation therapy had an overall survival of 87 percent compared with 96 percent for those without radiation, and overall survival in those who relapsed within the first five years after diagnosis was just 63 percent, compared with 93 percent for those who did not relapse early.

With regard to related health conditions, at least half of survivors reported one or more chronic medical conditions (cumulative incidence of 65 percent), compared with only 38 percent of their siblings. Importantly, survivors were 3.7 times more likely to have a severe or life-threatening medical condition and 2.8 times more likely to suffer from multiple chronic conditions than their siblings. These most often included musculoskeletal, cardiac and neurological conditions. Significantly more survivors experienced poorer health, mental health problems, activity limitations and functional impairment as compared with their siblings.

Again, radiation treatment and relapse status affected survivors’ risk of chronic disease: patients who had received radiation or had an early relapse experienced higher rates of chronic or life-threatening conditions than those survivors who had not received radiation or relapsed. For example, the cumulative incidence of severe, life-threatening chronic conditions was 23 percent for radiation therapy survivors, compared with just 13 percent for non-radiation therapy survivors.

Survivors’ social and economic outcomes, including rates of marriage, college graduation and health insurance coverage, were also significantly lower than those of their siblings. Both female and male survivors were more likely to be unemployed than their siblings, though only in the females were the differences statistically significant. Most socioeconomic factors were not affected by relapse status, with the exception of male employment rates. However, RT seemed to affect these outcomes, as female RT survivors reported significantly lower rates of marriage, college graduation, and health insurance coverage than non-RT female survivors. Male RT survivors also reported lower rates of education attainment compared with non-RT survivors.

“Our findings suggest that the vast majority of the children with ALL who survive five years from the time of diagnosis are likely to be long-term survivors. Survivors treated without radiation therapy who did not relapse appear to have health outcomes and quality of life similar to the general population. However, survivors who have suffered a relapse of the disease or who have been treated with radiation therapy continue to fight with excess comorbidities and poor socioeconomic outcomes for many years following therapy, and it is important that we educate the patients, families and their physicians about these long-term issues,” said Mody, a physician at the University of Michigan Comprehensive Cancer Center. “As therapeutic interventions improve and more children beat leukemia, it’s important to work toward not only higher survival rates, but also improved overall wellness.”

Source: University of Michigan Health System

RELATED STORIES:
Green Tea: Mixed Reviews for Cancer Prevention   And the number one cancer myth is…   UNC study supports role of circadian clock in response to chemotherapy   Mouse Mimics Chronic Leukemia, Will Aid Drug Development   Electric fields have potential as a cancer treatment   How Eating Red Meat Can Spur Cancer Progression   Researchers Find Melanoma Not Caused by Early UVA Light Exposure   Brits denied new targeted bowel cancer drugs   Young Volunteers Help Close Social Gap in Cancer Care   U of M Researchers Find Childhood Cancer Risk Rises with Mother’s Age   Active lifestyle may prevent cancer: Japan study   Hodgkin’s survivors at increased risk for leukemia   Killing Cancer Like a Vampire Slayer   Rare abdominal cancer diagnosis being looked at in a different manner   The role of genes in the development of non-Hodgkin’s lymphomas   Burkitt lymphoma gene expression signature identified   Life after chemotherapy: Daily tasks, quality of life may be affected, MU researcher finds   Biomarkers Allow Doctors to Match Therapy to Patient   Green tea extract may boost cancer-fighting enzymes   Punctuated evolution in cancer genomes   Green tea may curb risk of some cancers   Cervical cancer test not recommended enough: study

Comments

[ + Post Your Own ]

Now you're in the public comment zone. What follows is not Armenian Medical Network's stuff; it comes from other people and we don't vouch for it. A reminder: By using this Web site you agree to accept our Terms of Service. Click here to read the Rules of Engagement.

There are no comments for this entry yet. [ + Comment here + ]