Got a guy in my PCa seminars group, whom is into year 14+ with PCa, failed Lupron years ago, also had Crohns issue. Well he was put onto Leukine injections since Lupron was ineffectiv in controlling his psa and disease progressions, and it is working 4+ years later and still working and he claims little side effects, luckily his insurance covers the expensive drug, but you can buy it from Canada for like $3500 for 10 self injections (you refrigerate it to keep it good).
Anyway it is known and worked in his case, the Leukine can cure Crohns disease, mentioned by Dr. Myers in PCRI videos too. So, if you didn't know this can work and their is another new drug out for Crohns, maybe it is similarly based medicine.
As for a corollation between the two, heck I don't know, I don't know squat about Crohns, but thought you might find this of interest. A PCa drug and other cancers drug, that happened to cure another scenario in a patient....this is interesting. Even if you have PCa perhaps you have an indolent or non agressive version and have many options. Best to you.