Menu Healthy Lifestyle Diseases & Conditions First Aid Symptoms Tests & Procedures Videos Definitions FAQs StenosisUpdated: 2017-06-13OverviewStenosis is an abnormal narrowing of an open space in the body, such as a blood vessel, duct, or canal.SymptomsDepending on the location, stenosis can restrict blood flow, causing a wide range of symptoms.TreatmentsTreatment ranges from replacing narrowed vessels to surgically widening narrowed spaces. © 1998-2022 Mayo Foundation for Medical Education and Research(MFMER). All rights reserved. Terms of Use