In people under age 30, radiation is a risk factor for a type of brain tumor called a meningioma, a Loyola University Medical Center study has found.
Researchers analyzed records of 35 patients who were diagnosed with meningiomas before age 30. Five had been exposed to ionizing radiation earlier in their lives.
They include two patients who received radiation for leukemia at ages 5 and 6; one who received radiation at age 3 for a brain tumor known as a medulloblastoma; and one who received radiation for an earlier skull base tumor that appeared to be a meningioma.
The fifth patient had been exposed at age 9 to radiation from the Chernobyl nuclear power plant disaster in Ukraine. Twenty years later, he was diagnosed with a meningioma.
In the five patients, the average latency period for the tumors was 23.5 years.
The study was published in the online journal Neuroscience Discovery.
"The results of this preliminary study have prompted us to look closely at radiation's effects on the brain," said Loyola neurosurgeon Vikram Prabhu, MD, first author of the study. Dr. Prabhu specializes in treating brain tumors.
A meningioma is a tumor, usually benign, that arises from the meninges — the membranes that surround the brain and spinal cord. Meningiomas comprise about one-third of all primary brain tumors, but are rare in children and young adults. It is one of the commonest brain tumors treated at Loyola by Dr. Prabhu and his team.
They are doing a follow-up study on patients of all ages who have been treated at Loyola for meningiomas. In collaboration with Dr. Omer Iqbal, from the Department of Pathology, they are analyzing the genetics and biology of tumor samples to find how they differ from samples of tumors not linked to radiation.
Loyola oncologist Kevin Barton, MD, a co-author of the study, said: "It is important to compare and contrast these post-radiation meningiomas with de novo meningiomas, both clinically and biologically, in order to further define optimal therapy."
Researchers so far have identified 14 meningioma patients who were exposed to radiation earlier in their lives. They include three patients who were exposed to Chernobyl radiation and 11 patients who received therapeutic radiation for such conditions as leukemia, medulloblastoma tumors and fungal infections of the scalp.
Dr. Edward Melian, a radiation oncologist at Loyola and co-author of the study, said patients generally have done very well with radiation treatments. "Although we have identified radiation as a risk factor for meningiomas, radiation remains an important part of the treatment regimen for certain lesions, and is helping us obtain good results for our patients."
Dr. Prabhu said physicians have become more judicious in using radiation for therapeutic purposes. For example, radiation no longer is used to treat fungal scalp infections.
"We have become more aware of the tumor-inducing properties of radiation," Dr. Prabhu said.
People who have been exposed to large doses of radiation to the head face a small risk of later developing brain tumors. If such a person experiences symptoms associated with brain tumors, including headaches, seizures, vomiting and blurry vision, he or she should see a doctor, Dr. Prabhu said.
Dr. Prabhu is a professor in the Department of Neurological Surgery at Loyola University Chicago Stritch School of Medicine. Dr. Melian is an associate professor in the departments of Radiation Oncology and Neurological Surgery. Dr. Barton is an associate professor in the Division of Hematology/Oncology. Other co-authors are Loyola biostatistician Rong Guo, PhD; Douglas Anderson, MD, a professor in the Department of Neurological Surgery; and Edward Perry, MD, who completed a residency in neurological surgery at Loyola.
The study is titled "Intracranial meningiomas in individuals under the age of 30; Analysis of risk factors, histopathology and the recurrence rate."
Jim Ritter | EurekAlert!
One gene closer to regenerative therapy for muscular disorders
01.06.2017 | Cincinnati Children's Hospital Medical Center
The gut microbiota plays a key role in treatment with classic diabetes medication
01.06.2017 | University of Gothenburg
An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.
Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...
Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.
Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...
Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.
As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...
Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.
With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...
Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine
Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...
19.06.2017 | Event News
13.06.2017 | Event News
13.06.2017 | Event News
23.06.2017 | Physics and Astronomy
23.06.2017 | Physics and Astronomy
23.06.2017 | Information Technology