Our Cancer Specialists in Arizona

Dr. Gordon L. Grado

Dr. Gordon L. Grado

Founder and Medical Director of the Southwest Oncology Centers

Dr. Gordon Grado is the founder and medical director of the Southwest Oncology Centers and the Grado Radiation Center of Excellence. He was born in Waterloo, Iowa and grew up in the Midwest. He has been married for 33 years to wife, research coordinator, and co-author of numerous articles, Mary Grado. They have three children, Katherine, Gordon Jr., and Michael.

He received his M.D. degree from Southern Illinois University School of Medicine and completed his internship at the University of Chicago followed by a residency to specialize in the treatment of cancer with radiation at the Mayo Clinic in Rochester, Minnesota.

Dr. Grado established his brachytherapy program in 1989 while he was the Chairman of the Radiation Oncology Department located at the Mayo Clinic in Scottsdale, Arizona. After reviewing various techniques and programs that were available to treat prostate cancer, Dr. Grado and a team of other specialists developed the first interactive program that would utilize both biplane transferal ultrasound and fluoroscopic imaging. To date, Dr. Grado has personally performed over 4,000 brachytherapy procedures.

In June of 2000, Dr. Grado was personally invited by Jane Hull, the Governor of Arizona to be a member of the Prostate Cancer Task Force.

For several years, Dr. Grado has been affiliated with the University of Minnesota Radiation Oncology Staff as an associate professor. It allows Dr. Grado the chance to work with an interdisciplinary team of experts in radiation therapy, urology, and medical oncology to continue his commitment to conducting groundbreaking research and providing exceptional patient care.

Dr. Grado continues to work with radiation facilities around the world to help in the training and the perfection of prostate brachytherapy. Among the international sites Dr. Grado has visited are San Paulo and Porto Alegre (Brazil), Mexico City (Mexico) and Beijing (China). Dr. Marcio Fagundes of the Centro de Oncologia Radioterapica de RGS (COR) invited Dr. Grado to travel to Brazil and teach the seed implant procedure to urologists and radiation oncologist in Porto Alegre.

Dr. Keerti M. Khandelwal

Dr. Franklin S. Danziger

Dr. Keerti Khandelwal, the newest member of the Southwest Oncology Centers’ medical oncology/hematology team, graduated from Government Medical College, Surat, India in 2005. She then completed a Masters in Public Health at the University of Southern Mississippi, followed by a residency in Internal Medicine at Louisiana State University completed in 2012. She then continued her training with a Hematology/Oncology Fellowship also at Louisiana State, from which she graduated in 2015. In November 2015, Dr. Khandelwal joined Dr. Atilio Giangreco and Dr. Bruce Ethridge as a medical oncologist/hematologist at Southwest Oncology Centers in Yuma.

According to Dr. “K,” she became interested in oncology/hematology during her internal medicine residency. She is thankful to God for giving her the ability and opportunity to render compassionate care to patients in their most special time of need. Complexity and swift advancement in the field excites her and fuels her intrigue for science.

During her free time she loves to be with her family, especially her toddler son. She also likes to sketch, paint, read, do yoga, and listen to music. She is married to Dr. Shivang Shah who is a cardiologist in Yuma.


1) Jafri, S. H. R., Previgliano, C., Khandelwal, K., & Shi, R. (2015). Cachexia Index in Advanced Non-Small-Cell Lung Cancer Patients. Clinical Medicine Insights. Oncology, 9, 87–93.

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2) Keerti Munnalal Khandelwal, Carlos Prevegliano,, Runhua Shi, Guillermo Sangster, Eduardo Toledo Gonzalez, Syed Hasan Raza Jafri; Louisiana State University Health Sciences Center, Shreveport, LA; Division of Oncology, The University of Texas Health and Science Center at Houston, Houston, TX (2014) Sarcopenia as a marker of outcome in patients with metastatic non-small cell lung cancer: A retrospective review. ASCO abstract 2014.

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Board Certifications:

Internal Medicine 2012
Hematology 2015
Oncology 2015

Dr. Michael Shea

Dr. Michael Shea

In 2012, Dr. W. Michael Shea, MD joined Yuma Oncology Center located at 1951 West 25th Street, Suite F, Yuma, Arizona. Dr. Shea is well known in the Yuma community, having co-founded Sonoran Desert Oncology (now Yuma Regional Cancer Center) in 2008.

Dr. Shea is an experienced and highly trained physician with multiple board certifications. After graduating from the University of Utah School of Medicine in 1977, he completed a residency in Internal Medicine and a fellowship in Hematology and Medical Oncology at Naval Hospital, San Diego. Later he completed a residency in Radiation Oncology at the Joint Center for Radiation Therapy, Harvard Medical School, in Boston. More recently, he was awarded board certification in Palliative Medicine, having served the hospice communities in several locations throughout his long career.

While focusing most of his energy on the practice of radiation oncology, he is also the assistant medical director at Hospice of Yuma. His scope of practice is unusually broad and holistic. He believes strongly that the best cancer care requires attention to lifestyle issues including fitness, nutrition, spirituality, financial well-being, and honest assessment of the goals, costs, and expected benefits of treatment for cancer and other chronic illnesses.

As a past clinical preceptor for Southwest College of Naturopathic Medicine, he is acquainted with many complementary and alternative cancer treatment methods, and he works hard to maintain optimistic, open- minded, empathetic, and compassionate relationships with all of his patients. He is the only physician in Yuma who uses acupuncture for treatment of pain, nausea, peripheral neuropathy, and other troublesome conditions often seen in cancer patients.

We welcome Dr. Shea to our practice. He is immediately available for consultations regarding general cancer management, radiation therapy, and supportive care. Yuma Oncology Center offers radiation treatment using Tomotherapy, a highly focused, helical intensity-modulated external beam radiation technique, and XOFT, an advanced, eco-friendly electronic high dose rate method for delivering low-energy radiation that is ideally suited for treatment of cancers of the skin and selected other sites.

Dr. S. Giangreco, M.D.

Dr. S. Giangreco M.D.

Dr. Giangreco was born in Asuncion, Paraguay, South America. He went on to study medicine at the National University School of Medicine in Asuncion, Paraguay from 1962 to 1968. This led to him being a staff physician at the Cruz Blanca Clinic in Asuncion, from 1968 to 1974. Dr. Giangreco then came to the United States and became a U.S. citizen while completing his internship and residency at Lutheran Medical Center and Cleveland Metropolitan General Hospital in Cleveland, Ohio from 1974–1977. Dr. Giangreco pursued further training in a fellowship program in Medical Oncology at Johns Hopkins Hospital Oncology Center in Baltimore, Maryland.

Dr. Giangreco has medical licensure in several states: Michigan, Maryland, California, and Arizona. He is a diplomate of the American Board of Internal Medicine as well as the American Board of Oncology. Dr. Giangreco went on to have a solo practice in oncology/hematology in Rancho Mirage and El Centro, California, and finally moved his practice to Yuma, Arizona where he currently resides. In Yuma, Dr. Giangreco worked with the Yuma Regional Medical Center and, later on, created Giangreco Medical Group, a medical oncology/hematology private practice. He recently joined Southwest Oncology Centers with offices in Yuma and Phoenix. Dr. Giangreco enjoys spending time with his family and runs a well-attended monthly prayer support group in his office for the last ten years. He teaches the Bible and prays with patients and families for the well-being of his patients.

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