FREQUENCY OF ANATOMICAL VARIATIONS OF PARANASAL SINUSES (PNS) ON ROUTINE CT SCANS

Mahum Zaidi

Abstract


Abstract

Objective: To report anatomical variations on routine CT Scans observed in the paranasal sinuses in patients presenting to a tertiary care facility.

Methods: A cross-sectional study conducted at the department of radiology of a tertiary care centre, intended to evaluate anatomical variations in patients with benign Sino-nasal pathologies presenting to the facility between 1st of August, 2016 and 31st of July, 2017. The data was collected by evaluating digital records of patients collected over the specified time.

Results: A complete analysis of the cross-sectional radiological examinations of 70 patients was carried out for the evaluation of anatomical variants prevalent in the population subset. The study included 44 males and 26 females with a median age of 35.8 years. Among the study population, 71.24% had a deviated septum with right-sided predominance, 35.71% with concha bullosa, 21.42% had septated maxillary sinus, 70% had agger nasi cells, 20% had haller cells, 18.57% had onodi cells and lastly 2.85% had hypertrophied ethmoid sinuses. A differentiation of olfactory fossa depth was also studied and characterized as per the Kero’s classification in which type-II was the predominant variety corresponding to 71.42% of the test subjects.

Conclusion: Knowledge of these variations preoperatively is of utmost importance for surgeons and failure to pay attention to these details can end up in devastating complications. Such studies can optimize patient care and can lead to reduction in adverse sequalae of surgical intervention.

Mesh terms: Paranasal Sinus Diseases, Maxillary sinus, Frontal sinus


Full Text:

PDF

References


Onwuchekwa RC, Alazigha N. Computed tomography anatomy of the paranasal sinuses and anatomical variants of clinical relevants in Nigerian adults. Egyptian Journal of Ear, Nose, Throat and Allied Sciences. 2017 Mar 1;18(1):31-8..

Kantarci M, Karasen RM ,Alper F, et al. Remarkable anatomic variations in paranasal sinus region and their clinical importance. Eur J Radiol 2004; 50: 296-302.

Souza SA, Souza MMA, Idagawa M, et al. Análise por tomografia computadorizada do teto etmoidal: importante área de risco em cirurgia endoscópica nasal. Radiol Bras 2008; 41:143–47.

Anthony JS, Harnsberger HR, Richard SB. Pneumatization of the paranasal sinuses: normal features of importance to the accurate interpretation of CT scans and MR images. AJR Am J Roentgenol. 1993; 160:1101–04.

Azila A, Irfan M, Rohaizan Y, et al. The prevalence of anatomical variations in osteomeatal unit in patients with chronic rhinosinusitis. Med J Malaysia 2011; 66:191–94

Gupta AK, RN Karadi, Saurabh Kumar et al Computerized tomography of paranasal sinuses: A road map to endoscopic surgery. Clin rhinol int j 2012; 5: 1-10

Budu V, Schnaider A, Tache MS, Bulescu I. Evaluation of osteomeatal complex pathology related to endoscopic sinus surgery – a retrospective analysis. Romanian J Rhinol 2015;5:95-100

Turna O, Aybar MD, Karagoz Y, Tuzcu G. Anatomic variations of the paranasal sinus region: Evaluation with multidetector CT. Istanb. MedJ 2014 ;15:104-09.

Adeel M, Rajput MS, Akhter S, Ikram M, Arain A, Khattak YJ. Anatomical variations of nose and para-nasal sinuses; CT scan review. J Pak Med Assoc. 2013;63:317.

Narendrakumar V, Subramanian V. Anatomical variations in osteomeatal complex among patient undergoing functional endoscopic sinus surgery. Clin Rhinol Int J 2016; 9: 28-32.

Perez-Pinas I, Sabate J, Carmona A, Catalina H C J, Jimenez C J. Anatomical variations in the human paranasal sinus region studied by CT. J Anat 2000;197:221–27.

Dua K, Chopra H, Khurana AS, Munjal M. CT Scan variations in Chronic Sinusitis. Ind J Radiol Imag 2005; 15:315-320.

Earwaker J. Anatomic variants in sinonasal CT. Radiographics. 1993; 13:381-415.

Sarna A, Hayman LA, Laine FJ, Taber KH. Coronal imaging of the osteomeatal unit: anatomy of 24 variants. J Comput Assist Tomogr 2002; 26: 153-57

Sivasli E, Sirikci A, Bayazyt YA, Gumusburun E, Erbagci H, Bayram M, et al. Anatomic variations of the paranasal sinus area in pediatric patients. Surg Radiol Anat 2003; 24:400-05

A.J. Fasunla, S.A. Ameye, O.S. Adebola, G. Ogbole, A.O. Adeleye, A.J. Adekanmi. Anatomical Variations of the Sphenoid Sinus and Nearby Neurovascular Structures Seen on Computed Tomography of Black Africans. East Cent Afr J Surg.2012; 17: 57-64.

O.E.Idowu, B.O.Balogun, C.A.Okoli. Dimensions, septation, and pattern of pneumatization of the sphenoidal sinus. Folia Morphol. 2009; 68:228-32.

Nitinavakarn B, Thanaviratananich S, Sangsilp N. Anatomical variations of the lateral nasal wall and paranasal sinuses: a CT study for endoscopic sinus surgery (ESS) in Thai patients. J Med Assoc Thai 2005; 88: 763-68.

Zinreich SJ, Mattox DE, Kennedy DW, Chisholm HL, Diffley DM, Rosenbaum AE. Concha bullosa: CT evaluation. Journal of computer assisted tomography. 1988 Sep 1;12(5):778-84.


Refbacks

  • There are currently no refbacks.


© Copyright PJR 2008-