Abstract
Purpose
To investigate the anatomical features of frontal recess (FR) drainage, and the classification of FR cells and frontal sinus (FS).
Methods
Fifty sides from 30 adult cadaver heads were examined. FR cells and FS along the drainage pathways were dissected under 0° and 70° endoscopic views using unique connecting structures between the uncinate process and the ethmoid bulla as landmarks.
Results
Connecting plates between the uncinate process and the ethmoid bulla were discovered and termed medial suprainfundibular plate (MSIP), which were observed on each cadaver head, and lateral suprainfundibular plate (LSIP) on 92% (46/50) sides. Separated by MSIP, two drainage pathways were identified and named medial pathways of the FR (MPFR) medial to the MSIP and the lateral pathways of the FR (LPFR) in the lateral side. Different drainage pathways of the FS were confirmed, in which drained into the MPFR in 37 and into the LPFR in 13 of the cadaver sides.
Conclusions
MSIP is the critical landmark for the recognition of MPFR, LPFR, and the classification of FR cells. The FR resection along LPFR and MPFR facilitated excellent exposure of FS.
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Acknowledgements
This study was supported by grants from National Natural Science Foundation of China (No. 81770985, No. 30973167).
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This study was funded by the National Natural Science Foundation of China (NSFC), Grant No. 30973167 and Grant No. 81770985.
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Jiang, W., Xie, S., Xie, Z. et al. Endoscopic frontal recess anatomy directed by the drainage pathways using the connecting plates as landmarks. Eur Arch Otorhinolaryngol 278, 3315–3323 (2021). https://doi.org/10.1007/s00405-020-06577-5
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DOI: https://doi.org/10.1007/s00405-020-06577-5