Navigation Links
Robert Avery, D.O., M.S.C.E., studies innovations to improve vision in children with tumors
Date:2/28/2014

Robert Avery, DO, MSCE, of Children's National Health System and colleagues are establishing innovative approaches with technology and medication to improve the vision of young children who have visual pathway glioma, a type of brain tumor.

Most optic pathway gliomas cause vision loss in children between one and eight years of age. As many as 20 percent of children with neurofibromatosis type 1 -- a genetic disorder that occurs in 1 in every 4,000 births may develop these tumors. It is estimated that nearly half of those children may experience vision problems from their tumors.

Optic pathway gliomas can also occur sporadically, and not be related to neurofibromatosis type 1. Vision loss from these tumors can range from mild to complete blindness, and may be permanent if not properly treated. Unfortunately, standard treatment with front line chemotherapy typically results in modest improvements or stabilization of their vision.

Using Medications

In their study published in JAMA Ophthalmology, Avery and his colleagues report on four children with optic pathway gliomas that demonstrated marked recovery of vision when treated with the medication Bevacizumab. Other Children's National researchers included Roger J. Packer, MD, Senior VP of the Center for Neurosciences and Behavioral Medicine, and Eugene I. Hwang, MD, a neuro-oncologist.

Bevacizumab is an angiogenesis inhibitor, a drug that slows the growth of new blood vessels, to treat various cancers.

Bevacizumab provides a fast, robust response in these children," Avery told Reuters Health. "Although it's not first-line treatment, Bevacizumab is a good alternative or adjunct treatment."

Dr. Avery and colleagues identified children who had recovery of visual acuity or visual field in treatment with Bevacizumab.

A nine-year-old girl's visual acuity improved from 20/400 to 20/100 within six weeks of Bevacizumab treatment and remained stable for nine months after the treatment was discontinued, Avery wrote. Her visual field improved after two months of Bevacizumab monotherapy and her visual acuity returned to normal after four months of therapy. It remained stable at 12 months.

The standard front line treatment using cardioplatin-based chemotherapy typically produces only a modest benefit in visual acuity, Avery says.

"Given that most patients with OPG-related visual impairment will show modest or no visual improvement with standard treatment, the incorporation of Bevacizumab in these cases may greatly improve visual outcomes and should be considered in appropriate clinical situations," Avery says.

Handheld Technology

In another study in JAMA Ophthalmology Avery and other researchers found that using innovative technology, such as handheld optical coherence tomography (OCT), may help physicians improve their ability to evaluate children with optic pathway gliomas by capturing three-dimensional ultrahigh resolution (e.g., 3 microns..one-half the width of a red-blood cell) images or their retinal axons. Avery's study was also reported in Reuters Health.

In that study, the other Children's National researchers included Packer, Hwang, Maria T. Acosta, MD, in neurology, Domiciano Jerry Santos, MD, in anesthesiology, sedation, and perioperative medicine, Dina J. Zand, MD, PhD, in the genetics program, Lindsay B. Kilburn, MD, in neuro-oncology, Kenneth N. Rosenbaum, MD, in genetics and metabolism, and Brian R. Rood, MD, clinical director of the neuro-oncology program.

In very young children with these tumors, it may be difficult to measure visual acuity especially if they have cognitive or behavioral difficulties. "The handheld OCT provides a safe, non-contact and objective measure of visual pathway integrity that does not rely on a child's cooperation," Avery says.

"We hope that our handheld OCT measures will someday improve our ability to detect and monitor tumor progression that cannot be discovered during a routine eye exam or MRI scan," Avery adds.


'/>"/>

Contact: Joe Cantlupe
jcantlupe@childrensnational.org
202-476-4500
Children's National Medical Center
Source:Eurekalert

Related medicine news :

1. Amyotrophic Lateral Sclerosis Association honors Dr. Robert Baloh, M.D.
2. June 2012 marks a milestone for International Urogynecology Associates as Dr. Robert D. Moore and Dr. John R. Miklos perform their 24th Neovagina Surgery in 24 months
3. Crimmins earns GSAs 2012 Robert W. Kleemeier Award
4. NAI Fellows Robert Langer, Leroy Hood and Member James Wynne receive US National Medals
5. Dr. Robert Barr of Barr Family Dentistry in San Jose, CA Receives Top Reviews for Painless Laser Dental Procedures
6. Challenging Conventional Wisdom, Dr. John Miklos and Dr. Robert Moore Repair a Failed Omental Flap Vesicovaginal Fistula Laporoscopically and Without an Omental Flap
7. Washington, DC Plastic Surgeon Dr. Roberta L. Gartside Launches New Website
8. Healthesystems Appoints Dr. Robert L. Goldberg as Chief Medical Officer
9. Robert S. Shumake’s Climbing Your Inner Mountain Makes Amazon Hot New Release and Kindle Best Seller List
10. Aid and Attendance Seminar with Robert Hart at the Timbers of Shorewood
11. Robert Beshirs of Help The Dallas Homeless, LLC
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/24/2017)... New York, New York (PRWEB) , ... May 24, 2017 , ... ... and general vascular surgery in New York City. He is known for ... his broad specialization in vascular surgery, Dr. Benvenisty holds sub-specialty training in treating renovascular ...
(Date:5/24/2017)... ... 2017 , ... Dr. Manju R. Kejriwal, a leading Ohio dentist, is now ... a referral. Dr. Kejriwal understands the emotional and financial toll traditional orthodontics can take ... Patients no longer need to feel the esthetic effects of wires and brackets when ...
(Date:5/24/2017)... ... May 24, 2017 , ... ... II of the HP3 (High-Performance Periodontal Practice) continuing education (CE) series. As a ... advancements in his field by attending numerous CE courses each year. His recent ...
(Date:5/24/2017)... ... 24, 2017 , ... If you are thinking of a visit to San Francisco , ... is the perfect time to visit. , Business Architecture Associates is pleased to offer 5 ... individuals, as a 4-½ day package for individuals, and as 4-½ day corporate package for ...
(Date:5/24/2017)... Falls, Wisconsin (PRWEB) , ... May 24, 2017 ... ... leader in clean label food ingredient solutions for the food and beverage industry ... factor in food ingredient statements during the purchasing decision process. As a result, ...
Breaking Medicine News(10 mins):
(Date:5/9/2017)... JERUSALEM , May 9, 2017  Oramed ... www.oramed.com ), a clinical-stage pharmaceutical company focused on ... today that the Canadian Intellectual Property Office has ... for Oral Administration of Exenatide". The patent covers ... analog. GLP-1 is an incretin hormone ...
(Date:5/6/2017)... 5, 2017   Provista , a proven leader in ... customers, today announced Jim Cunniff as the company,s ... and business experience to Provista, including most recently serving as ... California . He assumed his new role with ... great fit for Provista," says Jody Hatcher , president, ...
(Date:5/4/2017)... 2017  A recent study published in the ... light as a means of disinfection anesthesia workstations ... bioburden on anesthesia workstations. In the study, UVC ... medical equipment surfaces contaminated with three (3) organisms ... study further validates the body of literature supporting ...
Breaking Medicine Technology: