Sadie's most recent MRI results

Here is the e-mail i sent my family this afternoon. Blood work is done and now we wait...again.

"You can send this out as we are asking for prayer. Sadie had her repeat MRI today at 10 am. At 3:30, Dr. M called us with the results and said that they found a change. There is a thickening of the pituitary stalk that they had been looking for and this is a change from the previous MRI results. (Repeated MRI's were to look for "changes" as a small, slow-growing tumour may not necessarily show up in the first MRI's.) He said that this could either be nothing, or it could be very serious. It could be one of two things:
1. a brain tumour
2. Langerhans Cell Histiocytosis (which her history leans more towards)
From what I've read in the past, both would require chemotherapy. Dr Marks has already talked to the Hematologist/Oncologist and said that he was going to call them back after he got off the phone with me. He is sending a requisition to the lab for us to get done and he said that we should have an appointment with Hematology/Oncology within 1-2 weeks. I just called the lab and the rec came in so we're going to go in tonight and try to get it done before the long weekend. Please pray for Sadie and for us as we navigate these waters with the kids. I am usually a woman of too many words and i don't want to say too much, or the wrong thing, or jump to any conclusions. Just to handle each little piece of information as it comes. Asking again for wisdom. -j"