<human>: I've been freaking out for the past two days, since we got the news. The cyst is 1.5 cm big and it's located on her pineal gland. What are the chances that this can be malignant? Are there any procedures or surgeries that can help her if (god forbid) things get worse? The doctor said that it's nothing to be worried about for now (we have to see if it gets bigger) but my entire family is devastated. Obviously, we are going to get second and possibly third opinions to see what other doctors have to say. Has anyone on reddit been a witness to a similar scenario? We don't know what kind of cyst it is yet....but any information that anyone has will help. Thanks.

Can you condense the text into a few key points?
<bot>: Sister has 1.5 cm cyst on her pineal gland in her brain. Doctor says she should be fine for now but does anyone have any useful information or anything at all to help?