caa a22 4500 606186549 CHVBK 20210128100836.0 cr unu---uuuuu 210128e20150501xx s 000 0 eng 10.1007/s00405-014-2923-8 doi (NATIONALLICENCE)springer-10.1007/s00405-014-2923-8 The round window region and contiguous areas: endoscopic anatomy and surgical implications [Elektronische Daten] [Daniele Marchioni, Matteo Alicandri-Ciufelli, David Pothier, Alessia Rubini, Livio Presutti] The round window region is a critical area of the middle ear; the aim of this paper is to describe its anatomy from an endoscopic perspective, emphasizing some structures, the knowledge of which could have important implications during surgery, as well as to evaluate what involvement cholesteatoma may have with these structures. Retrospective review of video recordings of endoscopic ear surgeries and retrospective database review were conducted in Tertiary university referral center. Videos from endoscopic middle ear procedures carried out between June 2010 and September 2012 and stored in a shared database were reviewed retrospectively. Surgeries in which an endoscopic magnification of the round window region and the inferior retrotympanum area was performed intraoperatively were included in the study. Involvement by cholesteatoma of those regions was also documented based on information obtained from the surgical database. Conformation of the tegmen of the round window niche may influence the surgical view of round window membrane. A structure connecting the round window area to the petrous apex, named the subcochlear canaliculus, is described. Cholesteatoma can invade the round window areas in some patients. Endoscopic approaches can guarantee a very detailed view and allow the exploration of the round window region. Exact anatomical knowledge of this region can have important advantages during surgery, since some pathology can invade inside cavities or tunnels otherwise not seen by instrumentation that produces a straight-line view (e.g. microscope). Springer-Verlag Berlin Heidelberg, 2014 Retrotympanum nationallicence Endoscopic ear surgery nationallicence Cholesteatoma nationallicence Middle ear anatomy nationallicence Round window nationallicence Marchioni Daniele Otolaryngology Department, University Hospital of Modena, Via del Pozzo 71, 41100, Modena, Italy aut Alicandri-Ciufelli Matteo Otolaryngology Department, University Hospital of Modena, Via del Pozzo 71, 41100, Modena, Italy aut Pothier David Department of Otolaryngology Head and Neck Surgery, Toronto General Hospital, 200 Elizabeth Street, M5G 2C4, Toronto, ON, Canada aut Rubini Alessia Otolaryngology Department, University Hospital of Modena, Via del Pozzo 71, 41100, Modena, Italy aut Presutti Livio Otolaryngology Department, University Hospital of Modena, Via del Pozzo 71, 41100, Modena, Italy aut European Archives of Oto-Rhino-Laryngology Springer Berlin Heidelberg 272/5(2015-05-01), 1103-1112 0937-4477 272:5<1103 2015 272 405 https://doi.org/10.1007/s00405-014-2923-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00405-014-2923-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Marchioni Daniele Otolaryngology Department, University Hospital of Modena, Via del Pozzo 71, 41100, Modena, Italy aut NATIONALLICENCE 700 1- Alicandri-Ciufelli Matteo Otolaryngology Department, University Hospital of Modena, Via del Pozzo 71, 41100, Modena, Italy aut NATIONALLICENCE 700 1- Pothier David Department of Otolaryngology Head and Neck Surgery, Toronto General Hospital, 200 Elizabeth Street, M5G 2C4, Toronto, ON, Canada aut NATIONALLICENCE 700 1- Rubini Alessia Otolaryngology Department, University Hospital of Modena, Via del Pozzo 71, 41100, Modena, Italy aut NATIONALLICENCE 700 1- Presutti Livio Otolaryngology Department, University Hospital of Modena, Via del Pozzo 71, 41100, Modena, Italy aut NATIONALLICENCE 773 0- European Archives of Oto-Rhino-Laryngology Springer Berlin Heidelberg 272/5(2015-05-01), 1103-1112 0937-4477 272:5<1103 2015 272 405