Tonsillar Retractor-induced Subacute Submassive Tongue Edema

Inclusion Criteria for study group: * Patients aged 16 years or younger * Undergo tonsillectomy surgery * Patients informed consent obtained from the parents Exclusion Criteria for study group: * Patients aged older than 16 years * Patients with a history of syndromal craniofacial abnormalities * Patients with systemic disorders and other otolaryngologic problems Inclusion Criteria for control group: * Patients aged 16 years or younger * Patients who did not need tonsillectomy surgery and any head and neck procedures * Patients who underwent endotracheal intubation under general anesthesia except tonsillectomy and head and neck surgery.