Hi, Welcome To HCM & Thanks For Asking Your Query Here From your medical history it is clear that you have loss of sense of smell , medically known as Anosmia and as you have already undergone physical examination by Many ENT surgeons and went For A CT scan too whether or not you will regain your sense of smell largely depends upon the cause of anosmia you have mentioned that there is mucosal thickening in your maxillary sinus , this may also be related to chronic sinusitis (an infection of sinus lining) and this can be treatable ,If Mucosal growth is present, surgery may be needed to remove the obstruction and regain your sense of smell your last ENT specialist has observed inflamed sinuses and had prescribed accordingly , you should take his treatment and see whether your condition improve or not Sometimes a person will regain his or her sense of smell spontaneously. Unfortunately, anosmia is not always treatable, especially if age is the cause. But there are steps you can take to make living with the inability to smell more pleasant and safer. For example, put fire detectors and smoke alarms in your home and office and take extra care with leftovers. If you have any doubt about a food s safety, don t eat it. finally i would strongly suggest you to keep treatment continue and follow your Dr I hope it help Thanks & Get well Soon