[Zope] Programmatically flushing entries from RAM cache?

Is it possible to flush a path w/ a specific argument from a RAM cache from a Python script? Here's my situation: I have a script FolderExists() that takes a single "path" argument and, after running an SQL query, returns True or False if the folder path exists or not in the database. Since the database query is relatively expensive, I want to cache its result in RAM. However, if a folder is created (using another Python script in the same Zope instance) I want to flush the cached result for the path (i.e., I don't want to flush all of the cached entries for the FolderExists method if that can be avoided). TIA, John