Thanks, Lana, the dog's boyfriend's owner suggested PIP too, so I will look into it.
I nearly ran a group of schoolkids over on my way to see the neurosurgeon yesterday, Fluffy. That would have been interesting trying to explain it to the police. The first couple had time to cross, the middle few were cutting it fine, then the last two or three looked at me driving towards them, then ran across the road after their mates like silly sheep, earning a blast of the horn and a glare.
I had thought of naming the tumour, Allergic. I toyed with Tommy Tumour or Timmy Tumour. However I have decided on...Boris! 