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!
New High-Performance Center Translational Medical Engineering
26.04.2017 | Fraunhofer ITEM
A promising target for kidney fibrosis
21.04.2017 | Brigham and Women's Hospital
More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.
Automated manufacturing processes are the basis for ultimately establishing the series production of CFRP components. In the project HolQueSt 3D, the LZH has...
Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.
"The structural robustness of thin metal films has significant importance for the reliable operation of smart skin and flexible electronics including...
The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.
Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...
The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...
Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.
Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...
20.04.2017 | Event News
18.04.2017 | Event News
03.04.2017 | Event News
26.04.2017 | Materials Sciences
26.04.2017 | Agricultural and Forestry Science
26.04.2017 | Physics and Astronomy