im a 75 yr ol male in a 45 yr old body apart from my enomous gut( i look pregnant) gained over the last 5 years,now 17 stone,on a sensible diet, but little exercise due to a very painfull knee under investigation.have tried desperately to lose weight by

dieting(under supervision) but still hover around 17st.I am not sedentary,allways busy , can i have weight loss surgery to remove this awfull lump which makes me tired, makes my knees worse is very depressing and debilitating generally and is not good for my health and longevity. the big stomach area is solid,firm as is all my stomach areafrom solar plexus to pubic area i'm not expecting a miracle cure but your comments and advice would be helpfull.