For those diagnosed with brain or spine tumors, Ascension Seton’s Cancer Care Collaborative offers a weekly multidisciplinary clinic. Patients can be referred to the clinic by their primary health care provider. They will be introduced to the dedicated patient navigation services we offer and may also be seen by a neuro-oncologist, a neurosurgeon, and a physical medicine and rehabilitation physician as well as a dietitian and health psychologist – all in one visit at the same location.

Our Team

Brian David Vaillant, MD

Dr. Brian Vaillant is a board-certified neurologist and neuro-oncologist. Dr. Vaillant received his undergraduate degree as well as his medical degree from the University of Wisconsin-Madison. He fulfilled his residency in neurology at the University of Washington Medical Center in Seattle and completed both a neuro-oncology fellowship and research fellowship at MD Anderson Cancer Center in Houston, Texas.

Dr. Vaillant specializes in the care of patients with brain and spinal tumors (both primary and metastatic) as well as patients with neurological complications due to cancer. He has a special interest in glioma stem cell research and translational research.

Dr. Vaillant is licensed in Texas, and is a diplomate with the American Board of Psychiatry and Neurology.

Mateo Ziu, MD

Dr. Mateo Ziu is a fellowship-trained neurosurgeon with Ascension Seton Brain & Spine Institute and participates in the Institute’s Comprehensive Brain & Spine Tumor Program. He received his medical degree from the University of Bari School of Medicine in Italy. Dr. Ziu completed his internship in general surgery at Vanderbilt University Medical Center in Nashville, Tenn, and his neurosurgery residency at The University of Texas Health Science Center at San Antonio. He also completed a research fellowship in anti-angiogenesis treatment of brain tumors at Children’s Hospital and Brigham and Women’s Hospital, affiliates of Harvard Medical School in Boston. Dr. Ziu most recently practiced at The University of Texas MD Anderson Cancer Center in Houston, where he completed its Neuro-Oncology Fellowship for the treatment of brain and spine tumors.

Dr. Ziu specializes in neurosurgical oncology, treating adults and children with primary and metastatic brain and spine tumors. He is trained in all aspects of evaluation and neurosurgical treatment of disorders of the brain, spine and peripheral nerves including conditions such as skull base pathologies, traumatic and degenerative spine disease, traumatic brain injury, peripheral nerve disorders, epilepsy and microvascular decompression.