Dr. John A. Olson

William Gillanders is a Surgical Oncologist and a General Surgeon in Saint Louis, Missouri. Dr. Gillanders is rated as a Distinguished provider by MediFind in the treatment of Parathyroid Adenoma. His top areas of expertise are Breast Cancer, Hyperparathyroidism, Thyroid Cancer, Parathyroidectomy, and Mastectomy. Dr. Gillanders is currently accepting new patients.

Peter Dipasco is a Surgical Oncologist in Saint Louis, Missouri. Dr. Dipasco is rated as an Advanced provider by MediFind in the treatment of Parathyroid Adenoma. His top areas of expertise are Pancreatic Cancer, Parathyroid Adenoma, Parathyroid Cancer, Small Bowel Resection, and Pancreatectomy. Dr. Dipasco is currently accepting new patients.

Dr. Conoyer is a seventh-generation resident of St. Charles County and a second-generation otolaryngologist—head & neck surgeon. He grew up in St. Charles, graduating from the Academy of the Sacred Heart in 1991 and from Duchesne High School in 1995. He then attended St. Louis University, where he majored in biology while minoring in philosophy and theology. In college, Dr. Conoyer was inducted into the prestigious Phi Beta Kappa and Alpha Sigma Nu Honor Societies. He graduated summa cum laude in 1999 and was selected for early admission to the Vanderbilt University School of Medicine in Nashville, Tennessee. He earned his Doctor of Medicine degree from Vanderbilt in 2003. After medical school, Dr. Conoyer continued his medical training at Vanderbilt University Medical Center, where he served his surgical internship from 2003-2004 and his residency in otolaryngology—head & neck surgery from 2004-2008. During residency, he authored multiple medical textbook contributions and original scientific articles. His original findings linking smoking to hearing loss garnered attention from national news outlets and many scientific citations. After serving a year as Chief Resident, he moved his family back home to St. Charles County to join Midwest ENT Centre in 2008. Since that time, Dr. Conoyer has developed a reputation as a regional early adopter of emerging medical technologies and minimally-invasive surgical procedures that offer better outcomes and quality-of-life to his patients. He was the first in the bi-state area to perform an in-office balloon sinus dilation procedure and remains among the nation’s most experienced with these procedures. He has similarly been a pioneer with many other office-based ENT technologies, including the Vivaer® procedure (treating nasal obstruction), Eustachian tube dilation, posterior nasal nerve treatments for vasomotor rhinitis, steroid-eluting sinus implantations and the fitting and placement of direct-drive hearing aids. Dr. Conoyer lives in St. Charles County with his wife, Ellen, and their four children. When not caring for his patients, he enjoys coaching youth basketball, wildlife land management and hunting. He is active in his Church, his local parish, and several outreach ministries. Dr. Conoyer is board-certified by the American Academy of Otolaryngology—Head & Neck Surgery and has been elected as a Fellow of the American College of Surgeons and the American Academy of Otolaryngic Allergy. Dr. Conoyer is rated as a Distinguished provider by MediFind in the treatment of Parathyroid Adenoma. His top areas of expertise are Nasal Septal Hematoma, Sinusitis, Infant Hearing Loss, and Chronic Rhinosinusitis with Nasal Polyps (CRSwNP).