NEED Help ASAP!!!!!!!!!!!!!!!!!!!!!!

[AnthonyFish20]

I have an albino red oscar and he has a tumor what do I do or is it ok to leave it alone plz tell me what to do
https://drive.google.com/open?id=0BwUtn34-05J4OE82dm5sR21NTmc

 

[pops]

keep the water pristine and let it be.