huh? what kind of tumor did you have?
I am only a layman - my best guesses are that your previous lesion - unknown type - has not recurred. But there is a new lesion that is not a tumor but a cyst (which is good since it cannot be cancer). Not sure the size give the info - the subependymal cyst when I looked it up appears to be more common in infants or can be caused by infections?
Let us know what your doctor says. Best of luck!