hi,
I just got out of hospital after having a canceous cyst removed.
I went through the same as your mum, scan, mamogram and core biobsy and my result was that it was a cyst with cancer inside, but they would not be able to tell me more untill they had the cyst out and into the laboratory, might not be the same as your mums, but if they were still saying it was a cyst up intil the last test sounds pretty much the same.
theres lots of different things that can be going inside a cyst.
and it is sometimes hard to tell if its a cancerous non cancerous growth within the cyst. Something to do with the type of cells round it.
If it is a cancer in there like mine then it is quite a rare form of slow growing cancer and the outlook is realy good-very rarely spreads round the body,
they defintatly found cancer cells from mine on the core biopsy.But could not say much about it.
yesterday I went to have it removed and the nodes tested. The nodes are clear. At this stage they are saying no other treatment, not even raidography, although they cannot say for sure till they get the results back.
I wonder what age your mum is–the most common age for this is 63-68
so it seems to me either your mum has a complex cyst, which they told me if that was the case they would still want to remove it, or a cancerous cyst.
It a very worrying time waiting for results, for both you and your mum. Its not nice when anything goes wrong with our bodies, but cancer strikes fear into us.
I had my op yesterday afternoon and am now at home tucked up in bed cos I am still a bit groggy. Hardly any pain, stopped taking the pills this morning. And i can even sleep on that side. Just need to take it carefull for a couple of weeks.
Please remember I am not a doctor, and I do not think you can diagnose on the internet, but it does sound very similar.