Dr. Thomas P. Trezona is originally from Portland and received his undergraduate degree from Portland State University in biology. He then attended graduate school at Portland State University in microbial genetics. His medical training was received at the Oregon Health Sciences University. He then did a General Surgery residency at Harbor-UCLA Medical Center in Southern California. Dr. Trezona received his Surgical Oncology and Medical Oncology training at the Stehlin Oncology Clinic and Stehlin Foundation for Cancer Research in Houston, Texas, where he trained with one on the great pioneers in melanoma research and treatment.

He remained at the Stehlin Oncology Clinic for two additional years and in 1994 was awarded the Houston’s Consumer Choice Award for Health Care Providers as the Physician of the Year. Most recently he was recognized as one of Lane County’s Best Doctors in a survey done by Eugene Magazine.

Dr. Trezona moved to Eugene and opened Cascade Surgical Oncology in 1995. He is board certified and an active member in the American College of Surgeons, the American Society for Clinical Oncology, and other national and international Surgical and Oncology Societies. He has published extensively in the oncology literature. Dr. Trezona is the only Surgical Oncologist between Portland and San Francisco with a focus of comprehensive cancer care. He cares for both the surgical and medical oncology needs of his patients in a personal and compassionate way. This specialized focus draws patients from beyond the Eugene/Springfield area. He sees patients from throughout the Willamette Valley, central and southern Oregon and northern California.

There has been a dramatic increase in recent years in the number of melanoma cases that occur in this country, and especially Oregon. Because of this, Dr Trezona has felt the need to develop a clinic focused entirely on the care of people with melanoma. This has led to opening the Oregon Melanoma Center where he is the lead melanoma doctor and focuses his attention on the care of people with melanoma.

He is married and the father of 2 daughters. Dr. Trezona relaxes with woodworking, boating, and maintaining a coral reef aquarium.

Jaime Steenkolk, LPN

Jaime Steenkolk has worked in medical offices for 30 years and has held leadership roles for 28 of those years. She feels that the profession chose her and she has grown and thrived in the changes that the profession has undergone over the years. A few years ago, Jaime returned to school and obtained her nursing license. She is thankful to work at Oregon Melanoma Center because she not only gets to lead an amazing team of professionals; but also gets to use her nursing skills providing direct patient care. It is the best of both worlds.

With the many changes in healthcare over the years, the constant that motivates Jaime is the heart of the doctor and staff in realizing that there is more to medicine than treating disease. At Oregon Melanoma Center there is a commitment to being present with the whole person, mind, body and spirit. That’s why she loves working here; it challenges her both professionally and personally.

Sydney Johnstone was born and raised in Detroit, Michigan. Her fascination with the field of medicine began early as she loved to tinker about her grandfather’s medical practice which he ran out of his historic Victorian home located in downtown Detroit. After high school, Sydney decided to “Aim High” and joined the United States Air Force where she trained as a military medic. After completion of her active duty service obligation she moved to Richmond, Virginia. It was there that she began her training in the operating room as a Surgical Technologist at the Medical College of Virginia. She was trained in multiple surgical specialties but had a love for vascular surgery. She served on the Vascular Transplant Team working side by side with some of the best surgeons in the world. She went on to train as a Surgical First Assistant and worked in this role while completing her undergraduate degree at Virginia Commonwealth University.

Before entering into graduate school, Syndey worked as a Surgical Technology Program Instructor then became a Surgical Technology Program Manager at Cambridge College. She completed her Physician Assistant training at the University of Washington MEDEX Northwest. Since graduation she has worked in Family Medicine, General Surgery and Orthopedic Surgery. She joined the Cascade Medical Surgical Oncology practice in April of 2018.

Sydney enjoys traveling and has participated in multiple medical missions trips throughout the world. She enjoys cooking and has taught cooking classes many times as fundraising events.