No, not everyone loses their navel. I had the traditional surgery and my scar runs from below my navel to the top of my pubic area; about 5-6 inches in length. My surgeon goes to extra trouble to keep the navel because it can be very emotional for people to lose it. But I do know that everyone has a different physiology which is why no incision lengths vary.
dx proctitis in 1987
dx UC in 1991, was stable until 1998
1998 started prednisone, asacol, pentasa, nortriptylene, ativan, 6MP, rowasa enemas and suppositories, hydrocortisone enemas, tried the SCD diet, being a vegetarian, omega 3s, flax, pranic healing, yoga, acupuncture, probiotics
2000 lost all my B-12 stores and became anemic
2001 opted for j-pouch surgery- now living life med-free