Just found out daughter has large cyst with small tumor beside it on her brain. The cyst is size of an apple. It is located on left hemisphere with small deviation to the right. They are talking about draining it, ect....but one of the side effects of draining they told us was brain swelling. My question is how frequently has anyone seen this? what questions do we ask, ect...this is out of my element....cardio/pulmo nurse here so I feel helpless in helping my husband. thanks for any info.....