title: Papillary endothelial hyperplasia (Masson's tumour) of the maxillary sinus.
abstract: In 1923, Masson described a neoplastic process consisting of papillary hyperplasia of the endothelial cells, with a consequent obliteration of the vascular lumen, followed later by degenerative changes. Masson coined the term vegetant intravascular haemangioendothelioma, however, these days it is more commonly known as papillary endothelial hyperplasia (PEH), or by the pseudonym, Masson's tumour. Although relatively rare, there are numerous accounts of PEH in the literature, describing its predilection for the head and neck region. Our case report describes the finding of a PEH within the paranasal sinuses, a site not previously mentioned even in the largest of series found on literature search. We will then discuss the relevant histological features of the lesion, and its natural history.
authors.affiliation: Department of Otolaryngology, Arrowe Park Hospital, Birkenhead, Merseyside.
authors.forename: J L
authors.initials: JL
authors.lastname: Lancaster
authors.forename: D J
authors.initials: DJ
authors.lastname: Alderson
authors.forename: I W
authors.initials: IW
authors.lastname: Sherman
authors.forename: A H
authors.initials: AH
authors.lastname: Clark
mesh_terms: D000368:Aged; D004730:Endothelium, Vascular / Q000473:pathology*; D005260:Female; D006801:Humans; D006965:Hyperplasia / Q000000981:diagnostic imaging / Q000473:pathology; D008443:Maxillary Sinus / Q000098:blood supply* / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed