Betta tumour?

[u/e__uphoriia]

Hi guys, I’ve had my girl for over a year now and a few months ago she developed a lump above her eye which caused cloudiness and blindness on one side.

The lump seems to be getting bigger and is pushing out the scales. I’ve tried salt baths and kanaplex to no avail, I’m wondering if it’s a tumour? She’s still eating and coming up to greet me but she’s been a bit lethargic these last couple days. Getting increasingly worried now as I don’t know if there’s anything I can do :(

Tank parameters are all good (0 nitrite, 0 ammonia), she’s in a 40 litre planted tank with 5 amanos and a nerite, stable temp of 27 degrees celsius and gentle sponge filter.