[Inverted papilloma--a pathohistologic and clinical analysis].

Thirty cases of inverting papilloma were reviewed retrospectively. The histology was reviewed and correlated with the clinical findings. The histology, site and clinical course allow these papillomas to be divided into three types: solitary nodular inverting papilloma, multilocalized nodular inverting papilloma, and myxoid inverting papilloma. Every group has its own prognosis. This separation makes it possible to decide the therapy, particularly the extent of the operation.