TY - JOUR
T1 - Comparison of the Retrosigmoid Suprameatal and Anterior Subtemporal Transpetrosal Approaches after Full Exposure of the Internal Acoustic Meatus
AU - Yüncü, Mustafa Eren
AU - Karadag, Ali
AU - Polat, Sarper
AU - Camlar, Mahmut
AU - Bilgin, Berra
AU - Quiñones-Hinojosa, Alfredo
AU - Middlebrooks, Erik H.
AU - Özer, Fusun
AU - Tanriover, Necmettin
N1 - Publisher Copyright:
© 2023 Oxford University Press. All rights reserved.
PY - 2023/9/1
Y1 - 2023/9/1
N2 - BACKGROUND AND OBJECTIVES:Surgical approaches to the ventral brainstem and petroclival regions are complex, and standard retrosigmoid and subtemporal approaches are often inadequate Retrosigmoid suprameatal tubercle (RSMTA) and anterior subtemporal transpetrosal (ASTA) approaches may provide extended surgical exposure with less brain retraction The objective of this study was to evaluate advantages and disadvantages of RSMTA vs ASTA, and illustrate the surgical corridors and 3-dimensional microsurgical anatomy of the related structures.METHODS:Four silicone-injected adult cadaver heads (8 sides) were dissected to evaluate the accessibility of lesions located at the petrous apex, ventral brainstem, and pontomedullary region using ASTA and RSTMA.RESULTS:Both ASTA and RSMTA provide access from the petrous apex to the ventral lower pons and pontomedullary junction A greater extent of safely resected bone was found in ASTA vs RSMTA ASTA provides a larger surgical view to the ventrolateral midpons, peritrigeminal region, superior neurovascular complex, pontomesencephalic junction, and posterior cavernous sinus Meanwhile, through cranial nerve V mobilization, RSMTA provides a larger surgical view to the lower half part of the pons, ventrolateral part of the pontomedullary junction, and middle and lower neurovascular structures.CONCLUSION:The
AB - BACKGROUND AND OBJECTIVES:Surgical approaches to the ventral brainstem and petroclival regions are complex, and standard retrosigmoid and subtemporal approaches are often inadequate Retrosigmoid suprameatal tubercle (RSMTA) and anterior subtemporal transpetrosal (ASTA) approaches may provide extended surgical exposure with less brain retraction The objective of this study was to evaluate advantages and disadvantages of RSMTA vs ASTA, and illustrate the surgical corridors and 3-dimensional microsurgical anatomy of the related structures.METHODS:Four silicone-injected adult cadaver heads (8 sides) were dissected to evaluate the accessibility of lesions located at the petrous apex, ventral brainstem, and pontomedullary region using ASTA and RSTMA.RESULTS:Both ASTA and RSMTA provide access from the petrous apex to the ventral lower pons and pontomedullary junction A greater extent of safely resected bone was found in ASTA vs RSMTA ASTA provides a larger surgical view to the ventrolateral midpons, peritrigeminal region, superior neurovascular complex, pontomesencephalic junction, and posterior cavernous sinus Meanwhile, through cranial nerve V mobilization, RSMTA provides a larger surgical view to the lower half part of the pons, ventrolateral part of the pontomedullary junction, and middle and lower neurovascular structures.CONCLUSION:The
KW - Anterior petrosectomy
KW - Anterior subtemporal transpetrosal approach
KW - Endoscopy
KW - Retrosigmoid
KW - Suprameatal tubercle
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U2 - 10.1227/ons.0000000000000752
DO - 10.1227/ons.0000000000000752
M3 - Article
C2 - 37255294
AN - SCOPUS:85168221430
SN - 2332-4252
VL - 25
SP - E126-E134
JO - Operative Neurosurgery
JF - Operative Neurosurgery
IS - 3
ER -