I posted about looking for this book a year ago, there are so many more members so maybe someone can help me.

Since I’m missing my now removed tumour I’m reminded of the book that I read where a guy gets a tumour removed and takes it home with him.

He doesn't feel fulfilled so he gets radiation on purpose so that he can have more tumours removed and bring them home. But his original tumour gets jealous that he's not enough.

What is the name of it? I cannot figure it out and it's bugging me! I’ve looked through every book I’ve read and every write up and review and I can’t find it. I have an inkling it might be in an anthology. Please help me so I can get it out of my mind.

Thank you in advance for the title.