It is difficult to provide an exact number of cases of Alice in Wonderland syndrome (AIWS) as it is a rare condition and many cases may go undiagnosed or unreported. Additionally, there is no formal reporting system for AIWS, and data collection is limited to individual case reports.
However, based on available literature and case reports, it is estimated that AIWS occurs in a small proportion of the population, with a higher prevalence among children and adolescents. The condition has been reported in individuals with various neurological and psychiatric conditions, such as migraines, epilepsy, and schizophrenia.
Overall, AIWS is considered a rare condition, and more research is needed to understand its prevalence and causes.