Woodruff's plexus-arterial or venous?

Woodruff's plexus is a vascular network located on the posterior lateral wall of the inferior meatus of the nasal cavity and it is generally considered to be responsible for posterior epistaxis. Despite being initially identified in 1949 as a venous plexus, discrepancies exist within literature regarding this anatomical structure, particularly its arterial or venous nature and its association with posterior epistaxis. This systematic review aims to collate information pertaining to Woodruff's plexus and evaluate our current understanding of this vascular area.

The systematic review was performed using published data in PubMed, Google Scholar, Scopus, EBSCO and Web of Science platforms using keywords such as 'Woodruff', 'posterior' and 'plexus'. Articles referring to Woodruff's plexus were collected and analysed by independent reviewers.

The search revealed 154 papers, out of which only 40 were included in the review. Out of this number only two papers were anatomical dissection studies, both of which identify the plexus as venous in nature. Seventeen studies describe the plexus as venous by citing these two papers. The remainder of the articles (23) consider Woodruff's plexus as arterial with variability in the reported arteries that supply it.

Woodruff's original description of a venous plexus is supported by modern anatomical studies. There are a multitude of reports that Woodruff's plexus is arterial in nature, despite the absence of existing anatomical studies to support this notion. This misconception has likely arisen due to clinical associations in relation to posterior epistaxis.