Lamina papyracea position in patients with nasal polypi: A computed tomography analysis

El‐Anwar, Mohammad Waheed; Khazbak, Alaa Omar; Eldib, Diaa Bakry; Algazzar, Hesham Youssef

doi:10.1016/j.anl.2017.09.006

Cited by 9 publications

(8 citation statements)

References 22 publications

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“… 5 There were different grades of nasal polyposis affecting up to 4% of the population, and also, larger polyps represent a risk factor during ESS. 6 Also, Gore et al demonstrated that residual ethmoid air cells on the LP were identified in 79% of revision ESS patients. 20 So, radiologic identification of the LP positions from the perspective of endoscopic approach can be of great help in efficient clearance of ethmoid air cells on the LP and avoidance of penetration.…”

Section: Discussionmentioning

confidence: 99%

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Computed tomography based analysis of the lamina papyracea variations and morphology of the orbit concerning endoscopic surgical approaches

Açar

Büyükmumcu

Güler

2019

Brazilian Journal of Otorhinolaryngology

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Section: Discussionmentioning

confidence: 99%

“…Also, revision ESS can be required for residual unopened ethmoid cells at the LP due to insufficient knowledge of the radiological and endoscopic sinonasal anatomy. 4 , 6 …”

Section: Introductionmentioning

confidence: 99%

Computed tomography based analysis of the lamina papyracea variations and morphology of the orbit concerning endoscopic surgical approaches

Açar

Büyükmumcu

Güler

2019

Brazilian Journal of Otorhinolaryngology

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“…12,13 Proper imaging study of the sinonasal anatomical variations is one of the guide tools in the way to get a safe and effective ESS. 14,15 Preoperative knowledge of the course of the AEA within the ethmoid sinuses assists the surgeons to avoid its injury during ESS to get a safe surgical procedure. 16 Moreover, the anterior ethmoid sulcus in the lateral lamella of the cribriform plate creates the weakest point of the anterior skull base, where cerebrospinal fluid (CSF) leaks may occur.…”

Section: Introductionmentioning

confidence: 99%

Anterior Ethmoidal Artery: A Computed Tomography Analysis and New Classifications

El‐Anwar

Khazbak

Eldib

et al. 2020

J Neurol Surg B Skull Base

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Objective to determine the anterior ethmoidal artery (AEA) anatomy and variations by computed tomography (CT) in adult and their relations to and presents new AEA classifications. Methods One hundred and fifty paranasal CT scans (300 sides) were included. Axial images were acquired with multiplanar reformates to obtain delicate details in coronal and sagittal planes. Results One hundred and forty-four AEAs canal (48%), 293 AEAs foramen (97.7%), and 229 AEAs sulcus could be detected (76.3%). The mean AEA intranasal length was 6.7 ± 1.27 mm (range: 4.24–10.6 mm). The mean angle between AEA and lamina papyracea was 105.49 ± 9.28 degrees (range: 76.41–129.76 degrees). Of them, 95.8% AEAs had an angle with lamina >90 degrees, while 4.2% had angle <90 degrees. The mean angle between AEA and lateral lamella of cribriform plate was 103.95 ± 13.08 degrees (range: 65.57–141.36 degrees). Of them, 87.5% AEAs had an angle >90 degrees and 12.5% had an angle <90 degrees. The mean distance between AEA and skull base was 1.37 ± 1.98 mm (range: 0–8.35 mm). The AEA types in relation to skull base was type 1 (0–2 mm from skull base; 64.6%), type 2 (2–4 mm; 22.2%), type 3 (4–6 mm; 11.1%), and type 4 (>6 mm; 2.1%). The mean distance between the AEA and frontal sinus ostium was 9.17 ± 4.72 mm (range: 0–25.36 mm). AEA classification according to distance from AEA to frontal sinus ostium was 17.4% type 1 (<5 mm), 41.7% type 2 (5–10 mm), 31.9% type 3 (10–15 mm), and 9% type 4 (>15 mm). Conclusion Provided AEA details improve surgeons' awareness of AEA variations in the endoscopic field and can help residents in training.

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“…Proper radiological study of the paranasal sinus (PNS) anatomy and their variations is critical for preoperative planning and intraoperative orientation and represent the key for safe and complete surgical procedures particularly endoscopic sinus surgery (ESS) [1,2]. Therefore, literature are rich with endoscopic, radiologic, and anatomic studies that provide surgeons with better orientation during ESS [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Retromaxillary recess of the sphenoid sinus: an overlooked recess

El‐Anwar

Almolla

Eldeeb

et al. 2021

Egypt J Otolaryngol

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Background Retro-maxillary recess of the sphenoid sinus is an area that is yet to have appropriate description in the literature and usually overlooked. The objective of the current study was to determine the incidence and detailed description of the retromaxillary recess of the sphenoid sinus by multi-slices computed tomography (MSCT) in adults. Paranasal MSCT scan of asymptomatic adults was done for all our subjects to obtain delicate anatomical details of the recess using coronal, axial, and sagittal reformatted capability. Each sphenoid sinus in the CT was revised to find and describe the retro-maxillary recess of the sphenoid sinus regarding its extensions and dimensions. Results This study included 100 adult subjects (200 sphenoid sinuses); retro-maxillary recess was detected in 16.5% (33 sides) of them using MSCT. They were distributed in 20 subjects (20% of all examined sphenoid sinuses). Sixty-five percent of reported recesses were bilateral. Range of antero-posterior diameter (depth) of the recess was 3.9 to 14 mm while its width range was 1.1 to 9 mm. The thickness of the bony septum between the recess and the maxillary sinus ranged from 0.2 to 3.2 mm. Conclusion Current work described in details the retromaxillary recess in CT and its nearby surrounding important structures in all directions. From our results, it is recommended to add the retromaxillary recess of the sphenoid sinus to the preoperative CT checklist particularly in revision cases.

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Lamina papyracea position in patients with nasal polypi: A computed tomography analysis

Cited by 9 publications

References 22 publications

Computed tomography based analysis of the lamina papyracea variations and morphology of the orbit concerning endoscopic surgical approaches

Computed tomography based analysis of the lamina papyracea variations and morphology of the orbit concerning endoscopic surgical approaches

Anterior Ethmoidal Artery: A Computed Tomography Analysis and New Classifications

Retromaxillary recess of the sphenoid sinus: an overlooked recess

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