Brownsville
Balesh Sharma, MD
Medical Oncology/Hematology
Balesh Sharma, MD specializes in internal medicine, medical oncology and hematology. He is board certified by in
medical oncology. Dr. Sharma received an MD Delhi University in New Delhi, India, in 1990, where he also
completed his residency in Anesthesia and Critical Care in 1991. He completed his medical internship at Lincoln
Medical Center in New York in 1992-93. Dr. Sharma completed his residency in internal medicine at St. Vincent’s
Medical Center in affiliation with Yale University School of Medicine, Connecticut. In 1998, he completed a
fellowship in hematology and oncology from University of Texas Southwestern Medical Center in Dallas, and has
been in private practice since then.
Marcelo Boek, MD
Medical Oncology/Hematology
Dr Marcelo M Boek specializes in Internal Medicine and Medical Oncology/Hematology. He is board certified in
Medical Oncology and Hematology. He received his medical degree from Federal University of Rio Grande do Sul
in Brazil. He also completed his Internal Medicine residency at Jackson Memorial Hospital- University of Miami.
In 2003 he completed his Fellowship in Medical Oncology and Hematology at John Strogger- Cook County
Hospital in Chicago. Dr Boek then worked as a Medical Oncologist at The Saskatchewan Cancer Agency at The
Allan Blair Cancer Centre in Regina, Saskatchewan, Canada, and as an investigator affiliated with The North
Central Cancer Treatment Group and the National Cancer Institute of Canada. He was also appointed as a Clinical
Assistant Professor with the Division of Oncology, College of Medicine at the University of Saskatchewan and
held this job until he moved back to the United States. Dr Boek joined Texas Oncology in 2006
Carlos Gonzalez-Angulo, MD
Radiation Oncology
Dr. Gonzalez specializes in radiation oncology and internal medicine. He is certified by the American Board of
Internal Medicine as well as the American Board of Radiology, and is a member of the American Society of
Therapeutic Radiation Oncology (ASTRO), American College of Radiation Oncology (ACRO). He completed his
fellowship in radiation oncology at Roswell Park Cancer Institute, in Buffalo, New York, and also completed a
second residency in radiation oncology at Jackson Memorial Hospital/Sylvester Comprehensive Cancer Center,
in Miami, Florida. Aside from his medical practice, Dr. Gonzalez is a Christian lay minister and a student of
ancient Greek.
Mariza D. Oliver, MSN, APRN, FNP-C
Advanced Practice Provider
Mariza is a certified Family Nurse Practitioner, Advanced Practice Registered Nurse, and has a Masters degree in
Nursing Administration. She has over 17 years experience in nursing and has worked in healthcare areas such as
medical-surgical, post-partum, hospice, and home health. She has extensive experience in providing care for the
adult and geriatric population of the Rio Grande Valley.
2150 N. Expressway 83 Brownsville, TX 78521 PH: 956-548-0810 FAX: 956-548-2239
www.TexasOncology.com