<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hi , my daughter has a Arachnoid cyst in the right temporal of the brain , she is 13 years old and we knew this , when she felt down from the shopping, cart when she had 18 months 5 years later with an MRI appear a 3 mm an incidental pineal cyst 3mm 4 years later this cyst increase to 8 mm last month ,, she had another MRI ,the arachnoid cyst increase 3cm to 4.2cm in 4 years ,and the other is less than 1cm.But the test conclusion explain than she has a signal of abnormality in the left frontal lobe a focal cortical dysplasia I was searching information , and saw that there are 3 types . She never had a seizure , and I would like to know if this can be result of the injury that she had when she had 18 months She is bright at school last year she got 4 awards and trophies, she s in advanced programs at school ,I would like to know if this is treatable with medicines , side effects of this , and how can I know wich type of dysplasia do you think it is ?Thanks for your help !  <response>: Hi, I am Chat Doctor. I have read your question and understand your concerns. Let me try to help you Question 1 : if this can be result of the injury that she had when she had 18 months Answer 1 : CSF Cysts can be a result of injury, but Arachnoid Cysts are, in most cases, congenital Question 2 : I would like to know if this is treatable with medicinesAnswer 2 : No Question 3 : side effects of this, and how can I know with type of dysplasia do you think it is ? Answer 3 : If your daughter does not have any symptoms, I suggest that you just do a repeat MRI at Regular Intervals frequency to be decided by your Neurosurgeon, but I suggest annually Hope you found the answer helpful. You need to worry, if your daughter develops symptoms like headache, vomiting, weakness etc. Else, be cheerful. . . This cyst wont do anything bad in most individuals If you need any clarification have doubts have additional questions have follow-up questions, then please do not hesitate in asking again. I will be happy to answer your questions. Let me know if I can assist you further. Take care. 