I have a swollen abdomen that measures 43 inches! I am fairly slim everywhere else, eat healthily and go to the gym and, although I lost 9lb recently, my abdomen remains swollen. My dietician said it is a medical concern. I have had scans, and a colonoscopy, which all came back clear. My doctor, and a professor (who didn't even examine me), said it was just my body shape, and to live with it! However, I am having to wear clothes three sizes larger to accommodate my 'bump', and it is really getting me down. The swelling is solid and heavy, like being pregnant! I have no problems going to the loo. 

Is it possible I have a cyst, which cannot be detected by a scan?