Background: To determine frequency of malignancy in unilateral enlarged tonsil (UET) in different age groups without any other clinical feature. Method: In this descriptive cross sectional study patients (n=70) who underwent tonsillectomy,for tonsil asymmetry, were included. Group I, patients were of 3-12 years and in group II, were of 13 and above.All the patients were assessed clinically for regional(otolaryngology) and systemic disease. After tonsillectomy, difference in tonsils size was recorded on gross pathology, then specimens were sent for histopathology. Results: In group I, 40 patients were of age 3 to 12 years. Clinically mild difference (+1) was noticed in 13(32%), moderate (+2) in 20 and marked in 7(17.5%). In gross pathology a...