The Thyroid and Parathyroid Center Treatment Team

Our Surgeons

Our fellowship trained head and neck oncologic surgeons in the Department of Otolaryngology—Head and Neck are not only experienced in thyroid and parathyroid surgeries but are also experts in procedures related to surgical management of thyroid cancer, such as neck dissection, tracheal resection, examining the larynx, salivary gland dysfunction and voice rehabilitation.


Maisie L Shindo, M.D., F.A.C.S., Surgical Director

Maisie Shindo, MD - Director of Thyroid and Parathyroid Program

Dr. Maisie Shindo received her M.D. from The University of Southern California in 1984.  She completed her residency training in Otolaryngology Head and Neck Surgery at The University of Southern California Los Angeles County Medical Center, and earned her Board Certification in 1989.  Subsequently, she pursued fellowship training in Head and Neck Oncology at Northwestern University Hospital as well as a fellowship in Microvascular Reconstructive Surgery at Ohio State University.  In 1991 she joined the faculty of the Department of Otolaryngology-Head and Neck Surgery at The University of Southern California, where she gained national recognition for her work in micro-vascular head and neck reconstruction.  Dr. Shindo joined our department in 2008 as Professor and as the Director of the Thyroid and Parathyroid Center, providing a full range of consultative, diagnostic and therapeutic service dedicated to patients with thyroid and parathyroid disorders. She is also the director of Head & Neck Endocrine Surgery for the Department of Otolaryngology Head & Neck Surgery.

Dr. Shindo has special expertise in the multidisciplinary management of complex thyroid and parathyroid disease.  She has performed pioneering work applying new strategies, including minimally invasive parathyroidectomy, performed under local anesthesia and minimally invasive video-assisted thyroidectomy, an adaptation of the established laparoscopic procedure which provides patients the benefits of a much smaller incision, thus better cosmetic results.  Dr. Shindo’s microsurgical techniques, for which she completed advanced training, coupled with her precise operative skills offers the most sophisticated care available to our patients. Dr. Maisie Shindo, has been performing primarily endocrine surgery since 1991, and has dedicated her career to the management of thyroid and parathyroid diseases. Dr. Shindo has done well over 4,000 thyroid and parathyroid surgeries, and is nationally respected as one of the top endocrine surgeons in the United States.

Ryan Li, M.D.

Ryan Li, MD

Dr. Ryan Li completed a bachelor's degree in neuroscience at Brown University, followed by his M.D. at the University of Pittsburgh School of Medicine. He completed his surgical training in Otolaryngology-Head and Neck Surgery at Johns Hopkins Hospital. Dr. Li then completed a fellowship in Head and Neck Surgery-Microvascular Reconstructive Surgery at Stanford University. He is board-certified in Otolaryngology-Head and Neck Surgery.   

Dr. Li enthusiastically joins the faculty at Oregon Health and Science University in the Department of Otolaryngology-Head and Neck Surgery. As a new member of the Thyroid and Parathyroid Center Team, he joins a collaborative mission to walk patients through personalized consultations and complete diagnostic evaluations. Following these evaluations, Dr. Li devotes his time to developing treatment plans with patients, and personally performs their surgery and postoperative care. 

Dr. Li is proud to partner with Dr. Shindo as providers of the most advanced surgical techniques to treat thyroid and parathyroid conditions—techniques that provide the best cosmetic results, the most thorough control of disease, with the greatest regard for patient safety. Both Dr. Shindo and Dr. Li are highly experienced in minimally invasive parathyroidectomy, in which patients can undergo precise surgical treatment under local anesthesia and a calming brief sedation. In thyroid surgical research, the importance of receiving care at a high volume center has been shown essential to achieving the best results. Together Dr. Shindo and Dr. Li perform over 400 thyroid and parathyroid cases per year.  

"We are dedicated not only to performing the best surgery for you, but also guiding you through the entire treatment experience with your well-being in mind, at all times."


Lourdes Quintanilla-Dieck, M.D.

Lourdes Quintanilla-Dieck, MD
Dr. Lourdes Quintanilla-Dieck completed her Otolaryngology residency at Oregon Health & Science University and is board certified in Otolaryngology – Head and Neck Surgery. She received endocrine surgery training during residency while working closely with Dr. Maisie Shindo and developed a special interest in head and neck endocrine surgery.  She then pursued subspecialty training in Pediatric Otolaryngology at Vanderbilt University. Dr. Quintanilla returned to join the Thyroid and Parathyroid Center surgical team at OHSU, and sees both adult and pediatric patients with thyroid conditions. She has a special interest in genetic conditions predisposing to thyroid disease. She completed the American College of Surgeons Thyroid and Parathyroid Ultrasound Course at Stanford University, giving her the skills required to perform clinic ultrasounds as well as ultrasound-guided thyroid nodule biopsies.  Dr. Quintanilla is co-director of the DCH multidisciplinary Pediatric Thyroid Nodule clinic together with the Pediatric Endocrinology division. At this clinic, patients coming from near and far can meet the endocrinologist and surgeon, and undergo any additional imaging or procedures, all at the same visit. Dr. Quintanilla's research interests include thyroid pathology, with a special research focus on pediatric thyroid conditions including nodules and cancer.

James Lim, M.D., Endocrine Surgeon

Headshot of James Lim, MD

Dr. Lim is a fellowship-trained endocrine surgeon specializing in thyroid, parathyroid, adrenal and neuroendocrine diseases. In addition to joining the Division of Surgical Oncology, he is also joining the OHSU Thyroid and Parathyroid Center. He has advanced training in minimally invasive surgical techniques to remove the thyroid, parathyroid, adrenal glands and neuroendocrine tumors. He is also proficient in neck ultrasound and fine needle aspiration thyroid biopsies. Dr. Lim is looking forward to working with patients and their families to provide a multidisciplinary approach to their disease. 

His research interests are in the diagnosis and management of endocrine diseases and clinical outcomes. In his free time, he enjoys spending time with his family and exploring the great Oregon outdoors. 


Our Endocrinologists

Our endocrinologists provide a full range of diagnosis and treatment services to patients with thyroid and parathyroid disorders.  

Dana Madison, M.D., Ph.D., Medical Director

Dana Madison, MD, PhD

Dr. Madison graduated with a M.D. and Ph.D. (Biochemistry and Molecular Biology) from the University of Connecticut in 1998. He completed a residency in Internal  Medicine at OHSU in 2000 and an Endocrinology fellowship at OHSU in 2003. Dr.  Madison is board certified in Internal Medicine and Endocrinology. Dr. Madison serves as Co-Director of the Thyroid and Parathyroid Program, consulting with patients and providing a full range of diagnosis and treatment services to patients with thyroid and parathyroid disorders. His research interests are in molecular mechanisms of tumor metastasis and transcription.

Mary H Samuels, M.D.

Mary H Samuels, MD
Dr. Samuels` clinical and research interests are in pituitary disease and thyroid. After receiving her medical degree in 1983 at Harvard Medical School in Boston, Dr. Samuels completed both her residency and fellowship at the University of Colorado in Denver.

Kathryn G Schuff, M.D.

Kathryn G Schuff, MD
Dr. Schuff has clinical and research interests in pituitary and thyroid neoplasms and hormone regulation. She has conducted clinical research projects designed to improve diagnostic procedures as well as treatment modalities for patients with pituitary tumors including Cushing's syndrome, pituitary hormone deficiencies and thyroid cancer. She helps direct the Thyroid Tumor Clinic, a multidisciplinary clinic staffed by endocrinologists and otolaryngologists with close interaction with OHSU's head and neck radiologist and nuclear medicine staff to provide comprehensive, coordinated care for patients with thyroid and parathyroid disease.

Olga Senashova, M.D.

Olga Sensashova, MD
Dr. Senashova completed her undergraduate studies at Portland State University and her medical training at OHSU School of Medicine. She completed Internal Medicine residency at Providence St. Vincent Hospital in Portland and then returned to OHSU to complete a fellowship in Endocrinology, Diabetes and Metabolism. She was involved in several basic science research projects earlier in her career and during fellowship. After her fellowship, Dr. Senashova has spent 5 years in private clinical practice in Portland and now she has returned to OHSU to join the Otolaryngology team to narrow her focus and pursue her interest in thyroid cancer diagnosis, surveillance and treatment. Her interests outside of medicine include traveling with her family, skiing, and camping which makes Portland a great place to be!

Our Care Team

Management of patients at the Thyroid and Parathyroid Center is also complemented by members of other specialties, such as radiology, nuclear medicine, medical oncology, pathology, laryngologists, and radiation oncology.  

Matthew H Taylor, M.D.

Matthew Taylor, MD
Matthew H. Taylor, M.D. is a medical oncologist who dedicates his clinical practice and research to treating advanced thyroid cancer. Dr. Taylor specializes in Phase I clinical trials for patients with advanced cancers. He has a particular interest in thyroid cancers. In addition to his clinical research, Dr. Taylor studies cancer cells and patients tumors in his laboratory. Dr. Taylor and his wife Jessica, are the proud parents of four daughters. When he is not at the hospital, he is at soccer games, piano recitals, ballet and dance performances, and school plays. When there's time, he enjoys cycling, golf, and oddly enough – yard work.


The OHSU Genetics team evaluates individuals with hereditary cancers/syndromes that also involve thyroid and parathyroid tumors, such as multiple endocrine neoplasias and Cowden disease. Our pathologists have dedicated expertise in thyroid and parathyroid diseases. In addition, we offer personalized treatment based on genomic testing using tumor molecular markers. This includes analysis of molecular markers on thyroid needle biopsy to assess specific cancer risk in individual tumors, which can avoid surgery for some patients. Our ultrasonographers and surgeons are highly experienced in ultrasound for thyroid and parathyroid disease and can perform ultrasound guided needle biopsies (FNA). Our radiologists are also experts in reading CT scans, MRIs, PET scans and other nuclear medicine studies. The Center has an integrated approach to administration of radioactive iodine for thyroid cancer.


Care Coordinators


Natalie Smith, LPN

Support Staff

Stephanie Bunke - Surgery Scheduler

Nhumy Nguyen - Clinic Scheduler