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Papers by Alfredo Alarcon

Cureus, 2022

Celis-Aguilar et al. This is an open access article distributed under the terms of the Creative C... more Celis-Aguilar et al. This is an open access article distributed under the terms of the Creative Commons Attribution License CC-BY 4.0., which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Interdisciplinary Neurosurgery, 2021

Skull Base-an Interdisciplinary Approach, 2008

International Archives of Otorhinolaryngology, 2017

Introduction Labyrinthectomy and vestibular neurectomy are considered the surgical procedures wit... more Introduction Labyrinthectomy and vestibular neurectomy are considered the surgical procedures with the highest possibility of controlling medically untreatable incapacitating vertigo. Ironically, after 100 years of the introduction of both transmastoid labyrinthectomy and vestibular neurectomy, the choice of which procedure to use rests primarily on the evaluation of the hearing and of the surgical morbidity. Objective To review surgical labyrinthectomy and vestibular neurectomy for the treatment of incapacitating vestibular disorders. Data Sources PubMed, MD consult and Ovid-SP databases. Data Synthesis In this review we describe and compare surgical labyrinthectomy and vestibular neurectomy. A contrast between surgical and chemical labyrinthectomy is also examined. Proper candidate selection, success in vertigo control and complication rates are discussed on the basis of a literature review. Conclusions Vestibular nerve section and labyrinthectomy achieve high and comparable rates...

American Journal of Otolaryngology, 2015

To demonstrate the different neuro-otologic clinical presentations of tuberculosis. Study design:... more To demonstrate the different neuro-otologic clinical presentations of tuberculosis. Study design: Retrospective clinical analysis. Result: 83.3% of the cases of ear or central nervous system TB were without concomitant lung disease. 2 cases had primary infection in the central nervous system. The neurootologic manifestation was as follows: 85.7% sensorineural hearing loss; 42% polyneuropathy. 71.4% had granulation tissue. 2 had normal otoscopy. In 6 patients the histopathology and Ziehl Neelsen were confirmatory. One case was confirmed by the positive response to treatment with antituberculosis drugs. Conclusions: Tuberculosis has a wide variety of neurotologic manifestations from chronic otitis media cadres to vestibular, audiological and neurological manifestations as well as a large variability in imaging studies.

Journal of Electromyography and Kinesiology, 2014

Background: To determine the reliability and usefulness of intraoperative monitoring of the abduc... more Background: To determine the reliability and usefulness of intraoperative monitoring of the abducens nerve during extended endonasal endoscopic skull base tumor resection. Methods: We performed abducens nerve intraoperative monitoring in 8 patients with giant clival lesions recording with needle electrodes sutured directly into the lateral rectus muscles of the eye to evaluate spontaneous electromyographic activity and triggered responses following stimulation of the abducens nerves. Results: A total of 16 abducens nerves were successfully recorded during endoscopic endonasal skull base surgeries. Neurotonic discharges were seen in two patients (12% [2/16] abducens nerves). Compound muscle action potentials of the abducens nerves were evoked with 0.1-4 mA and maintained without changes during the neurosurgical procedures. No patient had new neurological deficits or ophthalmological complications post-surgery. Conclusions: Intraoperative monitoring of the abducens nerve during the extended endonasal endoscopic approach to skull base tumors appears to be a safe method with the potential to prevent neural injury through the evaluation of neurotonic discharges and triggered responses.

understanding asymmetric hearing loss is capital to screen correctly for a vestibular schwannoma

Cureus, 2022

Celis-Aguilar et al. This is an open access article distributed under the terms of the Creative C... more Celis-Aguilar et al. This is an open access article distributed under the terms of the Creative Commons Attribution License CC-BY 4.0., which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Interdisciplinary Neurosurgery, 2021

Skull Base-an Interdisciplinary Approach, 2008

International Archives of Otorhinolaryngology, 2017

Introduction Labyrinthectomy and vestibular neurectomy are considered the surgical procedures wit... more Introduction Labyrinthectomy and vestibular neurectomy are considered the surgical procedures with the highest possibility of controlling medically untreatable incapacitating vertigo. Ironically, after 100 years of the introduction of both transmastoid labyrinthectomy and vestibular neurectomy, the choice of which procedure to use rests primarily on the evaluation of the hearing and of the surgical morbidity. Objective To review surgical labyrinthectomy and vestibular neurectomy for the treatment of incapacitating vestibular disorders. Data Sources PubMed, MD consult and Ovid-SP databases. Data Synthesis In this review we describe and compare surgical labyrinthectomy and vestibular neurectomy. A contrast between surgical and chemical labyrinthectomy is also examined. Proper candidate selection, success in vertigo control and complication rates are discussed on the basis of a literature review. Conclusions Vestibular nerve section and labyrinthectomy achieve high and comparable rates...

American Journal of Otolaryngology, 2015

To demonstrate the different neuro-otologic clinical presentations of tuberculosis. Study design:... more To demonstrate the different neuro-otologic clinical presentations of tuberculosis. Study design: Retrospective clinical analysis. Result: 83.3% of the cases of ear or central nervous system TB were without concomitant lung disease. 2 cases had primary infection in the central nervous system. The neurootologic manifestation was as follows: 85.7% sensorineural hearing loss; 42% polyneuropathy. 71.4% had granulation tissue. 2 had normal otoscopy. In 6 patients the histopathology and Ziehl Neelsen were confirmatory. One case was confirmed by the positive response to treatment with antituberculosis drugs. Conclusions: Tuberculosis has a wide variety of neurotologic manifestations from chronic otitis media cadres to vestibular, audiological and neurological manifestations as well as a large variability in imaging studies.

Journal of Electromyography and Kinesiology, 2014

Background: To determine the reliability and usefulness of intraoperative monitoring of the abduc... more Background: To determine the reliability and usefulness of intraoperative monitoring of the abducens nerve during extended endonasal endoscopic skull base tumor resection. Methods: We performed abducens nerve intraoperative monitoring in 8 patients with giant clival lesions recording with needle electrodes sutured directly into the lateral rectus muscles of the eye to evaluate spontaneous electromyographic activity and triggered responses following stimulation of the abducens nerves. Results: A total of 16 abducens nerves were successfully recorded during endoscopic endonasal skull base surgeries. Neurotonic discharges were seen in two patients (12% [2/16] abducens nerves). Compound muscle action potentials of the abducens nerves were evoked with 0.1-4 mA and maintained without changes during the neurosurgical procedures. No patient had new neurological deficits or ophthalmological complications post-surgery. Conclusions: Intraoperative monitoring of the abducens nerve during the extended endonasal endoscopic approach to skull base tumors appears to be a safe method with the potential to prevent neural injury through the evaluation of neurotonic discharges and triggered responses.

understanding asymmetric hearing loss is capital to screen correctly for a vestibular schwannoma

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