Hey there, I'm Jasmine and obviously new here.
Short little intro : I'm 16 years old, with a mother currently in the surgical ICU, she's the reason why I joined Neuro Talk, in search of some answers.
These last few days have been some of the most stressful for my family and I.
This is very long but please bear with me, and help!!

I'll start with where it all started: My mom started complaining of numbness last friday in part of her left leg and arm. She went to go see the doctor on Monday, where the doctor said it seemed like she had suffered a "mini stroke" and assigned my mom an MRI for the following Thursday. The next day (Tuesday) her numbness was gone and she was perfectly fine. Wednesday came and it was back and slightly worse, so my dad decided to take her to the ER and not wait until the next day for the scheduled MRI.
At the ER they immediately got her CT scans, which revealed hydrocephalus (fluid in her brain) with an enlarged right ventricle. She then went and had EEG, EKG's, and ultrasounds which all turned out to be relatively normal. She then had an MRI, where the doctor said there was a small cyst, which they later diagnosed as a colloid cyst. We got this diagnosis yesterday.
The surgeon insisted on not wasting any time and said she should have surgery immediately. So at 10 this morning my mom went to have the cyst removed.
The surgeon came out and told us, that the hydrocephalus had been controlled but they had found no cyst. He even had a second surgeon go in and look, and they also put in an endoscope and check the spot....nothing.

So what I would like to know is, could there have been a problem with the MRI? A shadow? or could the doctors have missed something and there actually be a cyst or tumor still there?
As of this morning before the surgery my mom still had the numbness (she also had it on the left side of her face starting on wednesday) We aren't too sure if the numbness has gone away yet, since she is still very lethargic.

please answer my question! I'm so worried and just need answers.
a little background on my mom : she just turned 50 years old, works out every single morning, very in shape. 3 years ago she had a ski accident where she had a CT scan that revealed hydrocephalus with the enlarged ventricle. The doctor and surgeon were just made aware of that this morning before the surgery, after us begging them to read her previous CT scans.