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Background: Adenoids are nasopharyngeal lymphoid tissue aggregates that hypertrophy between the ages of 6–10 and then usually atrophy at the age of 16. Adenoid hypertrophy happens between the ages of 6 and 10but is uncommon in adults where it is commonly misdiagnosed and mistreated. This study is aimed at documenting the incidence of adenoid hypertrophy in adult Saudi patients, along with its symptoms, causes and risk factors so as to allow safer estimates of the disease and facilitate diagnoses in future cases.

Methods: It was a prospective study involving 100 adult patients > 20 years ago, attending Otolaryngology clinic for the first time were taken and their medical history and nose, ear and neck examination findings recorded. Following this, an F.O. scope and CT scans were performed to assess the nasopharyngeal mass, its severity and nature, followed by surgery and removal and subsequent histopathological assessment.

Results: Nasopharyngeal mass was found in 24% cases, all of which were male. Snoring was the most common symptom followed by nasal discharge, nasal obstruction and post-nasal drip (70.6%). Immuno-compromising conditions and allergies were associated co-morbidities.

Conclusions: Adenoid hypertrophy is not uncommon in Saudi adults. Symptoms seem to be consistent enough to allow for a good diagnosis if the physician is aware of them. Gender is a risk factor for the disease as are immuno-compromising conditions and allergies.

Keywords: Adenoid hypertrophy, Saudi, adults, risk factors, symptoms