Over time my son's tumors are always referred to in terms of food and as they grow it goes like this:
"Pea" "Grape" "Walnut" "Plum"
Then at the plum stage is the time it has grown too large so it then is "Burn"
That leaves something that looks like "Raisin"
By this time there is always another pea, "Raisin + Pea", and the process looks like it is going to keep going.