[baseball6]

My mom is 89 and she had a fall in July, 2013 and hit her head hard. She was driving a car , living alone, independent no problem before that fall. After a week was having right arm weakness and inability to say some words. On August 7 she had a burr hole surgery in left side of head. She has recovered quite well but has still some word hesitancy and dropping words and some memory, but not all the time. Still is shuffling when walking but doing outpatient therapy.Worse when tired. Right after the surgery, a CT showed no fluid. ,,,but on Sept 20 it showed hygroma.
They did a CT scan on Oct 4 and it said:
"There is stable prominance of cerebrospinal fluid space at the left frontal and parietal region again measuring 15mm in thickness. This is consistant with hygroma. The left sulci particularly at the vertex are smaller than on the right and this may represent some mass effect from the hygroma. No significant midline shift is seen."
An MRI of October 23 said:
"Stable moderate left frontal subacute to chronic subdural hematoma measuring 15 mm in maximum width with mild sulcal effacement in the left frontal lobe."
Is this something that HAS to be operated on again??? Mom is 89 and Im scared. Can this be watched to see if there is resorbtion???
How can it be followed??? They say that it will reabsorb over time. Anyone have any comments??