Plummer-Vinson syndrome is characterized by a triad of postcricoid dysphagia, upper esophageal webs, and iron deficiency anemia. It occurs more commonly in older white women and is associated with an increased risk of esophageal cancer. Diagnosis involves identification of anemia, esophageal webs on endoscopy or imaging, and ruling out other causes of dysphagia. Treatment focuses on iron replacement therapy and dilation of esophageal webs. Long-term follow-up is important due to cancer risks.