Background:All adenoid and tonsils tissue specimens are routinely histologically examined in pediatric otorhinolaryngology practice worldwide. This study aimed at determining the sociodemographic features, clinical presentation, indications, postoperative management, and histological diagnosis of the adenoid and tonsils tissues.Materials and Methods:This is a retrospective hospital-based study of patients who had adenotonsillectomy done between August 2008 and July 2018 at Golden Cross Infirmary Hospital, Festac Town, Lagos, Nigeria. All data were obtained from the patients' record, case note, and theater operation register. All the data obtained were collated and analyzed using SPSS version 18.0.Results:There were 59.2% of males with a male-to-female ratio of 1.5:1. Clinical presentation among the pediatric patients was 71.8% difficulty breathing, 64.8% snoring, 63.4% sleep apnea, 60.6% catarrh, and 54.9% noisy breathing. The most common indications for adenoid and tonsils surgery were obstructive sleep apnea in 64.8%. Adenoidectomy in 42.3% was the most common form of pediatric adenoid and tonsils surgery. The most common complication of adenoid and tonsils surgery was pain at surgical site/odynophagia in all the patients. Postoperative histological reports were reactive lymphoid hyperplasia in all the patients.Conclusion:Adenoid and tonsils surgeries are common pediatric otorhinolaryngology, head-and-neck surgical procedures. The most common indication found for adenoid and tonsils surgery was obstructive sleep. Adenoidectomy was the most common form of pediatric adenoid and tonsils surgery. All the adenoid and tonsils tissue specimens revealed histological benign diseases.