Hello and thank you for your post.

I am sorry to hear about your mum's situation.

A biopsy takes a section of an area or tumour away. So it is possible that the whole of the tumour, that the biopsy came from, could also have cancerous cells there. The MRI cannot distinguish between cancer cells and non-cancerous cells, if it did (I hate to point this out) no one would need a biopsy.  A scan such as an MRI can show an area that looks abnormal , a biopsy is nearly always needed to see what kind of abnormal area there is and if this abnormal area has cancer cells.  

Areas that show dysplasia can over time develop into cancer. Removing an area of dysplasia will mean that the threat of cancer is removed.  

I realise that waiting a few weeks to have surgery to remove this tumour could be worrying but it is unlikely to cause any harm to your mum.  

I hope this has helped and that your mum will be okay. Please get back to us if you need any more information or support.  You may find it helpful to talk things through with one of the nurses on our helpline.  The number to call is Freephone 0808 800 4040 and the lines are open from 9am till 5pm Monday to Friday.

Take care,

Caroline