Mildly prominent nasopharyngeal soft tissue, sent for further detailed assessmen. t what does it means?

Probably nothing: To me it sounds like absolutely nothing. I'm guessing that this was picked up on an x-ray or cat scan done for some other reason. It sounds like absolutely nothing to me and nothing that i think you need to be concerned about. That being said, the only information I have is the question that you posed so i would defer to the physician guiding your care for further evaluation and treatment.