Laryngopharyngeal reflux (LPR), also extraesophageal reflux disease (EERD) refers to retrograde flow of gastric contents to the upper aero-digestive tract, which causes a variety of symptoms, such as cough, hoarseness, and asthma, among others.
Although heartburn is a primary symptom among people with gastroesophageal reflux disease (GERD), heartburn is present in fewer than 50% of the patients with LPR. Other terms used to describe this condition include atypical reflux, and supraesophageal (or supra-esophageal) reflux.
Read more about Laryngopharyngeal Reflux: Background, Signs and Symptoms, Diagnosis, Treatment
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