Bone and Soft Tissue Tumor Team

Our team offers a unique multidisciplinary approach. We use the expertise of all our doctors, therapists and nurses to give you the most accurate diagnosis and effective treatment.

Our program treats all types of bone cancer and related conditions. The team includes orthopaedic oncology surgeons, oncologists, musculoskeletal radiologists, radiation oncologists, surgical oncologists, and bone and soft tissue pathologists. The entire sarcoma team will be involved in your care, from diagnosis through treatment and follow-up care.

Dr. Yee-Cheen Doung

Yee-Cheen Doung, M.D. specializes in treating tumors of the musculoskeletal system, including providing surgery and rehabilitation for sarcoma patients. Her research focus is on sarcomas and metastatic disease in bone (cancer that spread to the bone from another part of the body). She completed a fellowship at MD Anderson Cancer Center.

Dr. Kenneth Gundle

Kenneth Gundle, M.D. specializes in treating tumors of the musculoskeletal system, including sarcoma and metastatic disease in bone. His research on improving outcomes that matter most to patients has been presented at regional, national and international conferences and published in peer-reviewed journals. He completed a fellowship at the University of Toronto.

Dr. James Hayden

James Hayden, M.D., Ph.D. specializes in bone and soft tissue tumors, including surgery for bone sarcoma tumors, inflammatory arthropathies (joint diseases such as arthritis) and metabolic bone disease (bone-strength disorders). He completed a fellowship at Massachusetts General Hospital in Boston.

Sarah Jean Baptiste, P.A.-C.

Sarah Jean Baptiste, P.A.-C. earned her B.S. at Oregon State University and completed her M.S. at Mercy College in New York.

Michael Peterson, P.A.

Michael Peterson, P.A. earned his M.S. in Physician Assistant Studies from the University of St. Francis in Albuquerque, New Mexico.

Stephany Mayer, M.S.N., FNP-C

Stephany Mayer, M.S.N., FNP-C earned her B.S. and M.S.N. at the University of Cincinnati in Ohio.

Lara Davis, M.D

Lara E. Davis, M.D. is a medical oncologist who specializes in caring for patients with sarcoma. She has special expertise in adolescent and young adult sarcoma. She has advanced training in both adult and pediatric oncology, and she completed a fellowship at OHSU.

Christopher W. Ryan M.D.

Christopher W. Ryan, M.D. specializes in treating sarcomas and genitourinary cancers (kidney, bladder, prostate and testicular cancers). He strives to offer the latest treatments to patients through clinical trials. He is inspired by his many patients who received these treatments before they were widely available.

Arthur Y. Hung, M.D.

Arthur Y. Hung, M.D. is a radiation oncologist who specializes in soft tissue sarcomas and cancers of the reproductive organs. His research focuses on developing clinical trials and refining radiation techniques to eliminate side effects while giving patients the most benefit.

Schedule an appointment

Call 503-418-9030


OHSU Center for Health & Healing
Building 1
3303 S. Bond Avenue
Portland, OR 97239

Clinic at Umpqua Orthopaedics
277 Medical Loop
Roseburg, OR 97471

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