Adenomatous hyperplasia, commonly known as adenoid hypertrophy, is a common disorder in children. In children with small nasopharyngeal cavities and hyperplastic lymphatic tissue, adenoids can block the posterior nostril and pharyngeal pharynx, causing symptoms in the ears, nose, and throat. Symptoms in the ear are usually caused by adenoids blocking the pharyngeal orifice of the eustachian tube, causing secretory otitis media, resulting in hearing loss and tinnitus. Symptoms in the nose sometimes lead to sinusitis and rhinitis, resulting in yellow nasal discharge, nasal inaudibility, nasal sound in speech, snoring, and in severe cases, sleep apnea, and sometimes irritation of the throat, resulting in chronic pharyngitis and laryngitis, and even tracheitis. Long-term open-mouth breathing can cause facial developmental deformities, resulting in high arched palate, misaligned teeth, and protruding upper incisors, causing adenoid facial features. If the adenoid hypertrophy is mild, it can be treated conservatively, and the adenoids will slowly shrink at the age of ten or so.