Hi PBS and welcome to the Board!
I'll add to what Allen said.
Those nodules are a concern, and I am glad your husband is getting a biopsy to check out what is going on. I'm thinking the abnormal feeling could have been caused by prostatitis, though prostate cancer is a possibility too.
The pain you have described seems a lot more like the result of infection. I've just read of work at the Cleveland Clinic, a very well known institution, on prostatitis. It can be a complicated condition that varies greatly among patients.