AT the age of 32, my daughter had a grade 2 oligodendronglioma tumor removed from her left frontal lobe of her brain in 2012. Her follow-up MRI of last summer in 2014, they found a small pineal cyst in the cavity of where the tumor was. Is there any chance that this cyst will grow back into a tumor? She has ongoing symptoms after the initial surgery of migraine headaches, short term memory loss, weakness on her right side, irritability, periods of nausea, etc. These are the most common side affects which she had before the surgery and continues today (January 2015). She is scheduled for another MRI next week. My concerns are the cyst may turn into another tumor? Is there any chance of that?