I like my vet for precisely this reason - she recognizes that I do know some things (and I recognize that I don't know everything! She's the one who went to vet school after all!). Regarding the corns, she had never seen them before, so I suggested she Google "greyhound corns" and gave her the Grasmere Hosp. site; she called me a short while later to say that she had checked it out and was confident that she could do the job, so now we go in once a month to have Kieran's corns hulled (she has one on each foot!). We have found that if we wait longer, the corns get quite large and deep.
I don't know if other breeds get corns but I don't think so and my vet said she's never come across them before. I do agree they aren't "true corns" such as humans get from shoes that rub,etc., but the term is sufficiently descriptive that it's a good enough working title, IMHO. Regardless of what we call them, they ARE very painful for the dogs and they do need to be dealt with. Kieran wears her Therapaws when we go for our walks; in the winter, she wears her Blizzard Boots.
As for other lumps, we will join in the chanting here too!