Polyart POLY Polychrosis cunninghamiacola polymetallic nodule province polytetramethylene azelamide polyaniline/Nickel powder Most cases of adult intussusception are the result of an underlying medical condition. polyvinyl pyridine N-oxide Polyene phosphatidyl choline polymorphonuclear neutrophil polyvinyl acetate emulsision polyinosinate ribonucleotide