Reply to Liu’s Letter to the Editor regarding the article: “Frequency, location, and morphology of accessory maxillary sinus ostia: a retrospective study using cone beam computed tomography (CBCT)”

  • Kuofeng Hung
  • Carla Montalvao
  • Andy Wai Kan Yeung
  • Gang Li
  • Michael M. BornsteinEmail author
Letter to the Editor

Dear Editor,

We would like to thank Dr. Liu for his interest in our study and also the relevant comments on our article “Frequency, location, and morphology of accessory maxillary sinus ostia: a retrospective study using cone beam computed tomography (CBCT)” [3]. We have gone through the comments carefully and we have understood that Dr. Liu was mainly questioning about the high frequency of accessory maxillary ostia (AMOs) of 47.2% reported in our article, which is higher than the one found by previous studies—for further information please refer to the “Discussion” section of the article mentioned above.

Dr. Liu mentions that this rather high percentage may result from inaccurate or false identification of AMOs, which could have resulted in an over reporting of AMOs. Furthermore, Dr. Liu argues that any extra opening of the maxillary sinus located outside the region of nasal fontanelle and hiatus semilunaris should not be termed as an AMO on the basis of the mainstream definition....


Author contributions

KFH: manuscript writing and editing; CM: manuscript editing; AWKY: manuscript editing; GL: manuscript editing; MMB: manuscript writing and editing.


This reply letter was funded by departmental funds only.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


  1. 1.
    Ali IK, Sansare K, Karjodkar FR, Vanga K, Salve P, Pawar AM (2017) Cone-beam computed tomography analysis of accessory maxillary ostium and Haller cells: prevalence and clinical significance. Imaging Sci Dent 47:33–37CrossRefGoogle Scholar
  2. 2.
    Capelli M, Gatti P (2016) Radiological study of maxillary sinus using CBCT: relationship between mucosal thickening and common anatomic variants in chronic rhinosinusitis. J Clin Diagn Res 10:MC07–MC10PubMedPubMedCentralGoogle Scholar
  3. 3.
    Hung K, Montalvao C, Yeung AWK, Li G, Bornstein MM (2019) Frequency, location, and morphology of accessory maxillary sinus ostia: a retrospective study using cone beam computed tomography (CBCT). Surg Radiol Anat. CrossRefPubMedGoogle Scholar
  4. 4.
    Mahajan A, Mahajan A, Gupta K, Verma P, Lalit M (2017) Anatomical variations of accessory maxillary sinus ostium: an endoscopic study. Int J Anat Res 5:3485–3490Google Scholar
  5. 5.
    Ozel HE, Ozdogan F, Esen E, Genc MG, Genc S, Selcuk A (2015) The association between septal deviation and the presence of a maxillary accessory ostium. Int Forum Allergy Rhinol 5:1177–1180CrossRefGoogle Scholar
  6. 6.
    Rice HD, Scheaffer SD (1993) Endoscopic Paranasal sinus surgery. Raven Press, New YorkGoogle Scholar
  7. 7.
    Singhal M, Singhal D (2014) Anatomy of accessory maxillary sinus ostium with clinical application. Int J Med Sci Public Heal 3:327–329CrossRefGoogle Scholar
  8. 8.
    Yenigun A, Fazliogullari Z, Gun C, Uysal II, Nayman A, Karabulut AK (2016) The effect of the presence of the accessory maxillary ostium on the maxillary sinus. Eur Arch Otorhinolaryngol 273:4315–4319CrossRefGoogle Scholar
  9. 9.
    Yeung AWK, Colsoul N, Montalvao C, Hung K, Jacobs R, Bornstein MM (2019) Visibility, location, and morphology of the primary maxillary sinus ostium and presence of accessory ostia: a retrospective analysis using cone beam computed tomography (CBCT). Clin Oral Invest 23:3977–3986. CrossRefGoogle Scholar

Copyright information

© Springer-Verlag France SAS, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Oral and Maxillofacial Radiology, Applied Oral Sciences and Community Dental Care, Faculty of DentistryThe University of Hong KongHong KongChina
  2. 2.Department of Oral and Maxillofacial RadiologyPeking University School and Hospital of StomatologyBeijingChina

Personalised recommendations