"Dismissive and rude "

My mum has dementia and brain tumours who has recently been in hospital due to a fall and a bang to the head which caused her shunt to move slightly. Since leaving hospital she recently has experienced more falls and getting worse. The doctor rang me to ask what the problem was I explained and she basically asked me what I think was wrong I explained I have no idea what's why I am calling to have some form of investigation a new up to date brain scan maybe, I was then told if anything was wrong on the scan there is no treatment anyway. I found this doctor very dismissive disrespectful and an extreme lack of care. Although she apologised I feel this is not acceptable and more care and actually listening to patient should be considered in future