Background and Objective To compare the correlation between nasopharyngeal airway 1 month and 1 year after adenoidectomy using skull lateral views and subjective symptoms. Methods Thirty two children who underwent adenoidectomy and tonsillectomy from January 2003 through June 2006 were included. All were checked by skull lateral view as described above by retrospective review of medical records. Measurements included the nasopharyngeal air space from the choana to the lowest margin of C1 and the narrowest diameters of the nasopharyngeal air space and adenoid area. The adenoid-nasopharyngeal air space was determined as the A/N ratio. The parents completed a visual analog scale questionnaire at 1 month and 1 year post-operatively. Results The adenoidal-nasopharyngeal ratio was significantly increased at post-operative 1 year compared to 1 month after adenoidectomy on skull lateral views (p = 0.024). There was no significance of the size change between the other parameters in the 1 month and 1 year post-operative skull lateral views. There was no significant correlation between all parameters in the 1 month and 1 year post-operative skull lateral views, and change of subjectively rated symptoms. Conclusions There was no significant correlation between adenoid regrowth after adenoidectomy and the change of subjective symptoms.