Simultaneous Ipsilateral Epidermoid of the Petrous Apex Combined With Intracanalicular and Extracanalicular Facial Schwannoma

Ebmeyer J, Gehl H-B, Reineke U, Sudhoff H. Simultaneous Ipsilateral Epidermoid of the Petrous Apex Combined With Intracanalicular and Extracanalicular Facial Schwannoma. Otology & Neurotology. 2009;30(4):575-576

Vestibular Schwannoma Presenting as a White Middle Ear Mass Behind an Intact Tympanic Membrane

Ebmeyer J, Gehl H-B, Upile T, Sudhoff H. Vestibular Schwannoma Presenting as a White Middle Ear Mass Behind an Intact Tympanic Membrane. Otology & Neurotology. 2011;32(5):e32-e33

Quality Control after Intracochlear Intralabyrinthine Schwannoma Resection and Cochlear Implantation

Sudhoff H, Scholtz LU, Gehl HB, Todt I. Quality Control after Intracochlear Intralabyrinthine Schwannoma Resection and Cochlear Implantation. Brain Sciences. 2021;11(9): 1221.Background: The combination of intralabyrinthine schwannoma (ILS) removal and cochlear implantation is the standard of care after surgical resection for audiological rehabilitation. Intracochlear ILS is not only the most frequent tumor in this group of schwannomas, but it is also, to some degree, surgically the most challenging because of its position behind the modiolus. Recent developments in the knowledge of implant position, implant magnet choice, and magnetic resonance imaging (MRI) sequences make an MRI follow-up after surgical removal possible. Thus far, no results are known about the surgical success and residual rate of these kind of tumors. The aim of the present study was to perform an early MRI follow-up for the evaluation of residual or recurrent intracochlear ILS after surgical removal and cochlear implantation. Methods: In a retrospective study, we evaluated seven patients after an intracochlear ILS removal and single-stage cochlear implantation with a mean period of 13.4 months post surgery with a 3T T1 GAD 2 mm sequence for a residual ILS. Patients were operated on using an individualized technique concept. Results: In six out of seven cases, 3 T T1 GAD 2 mm MRI follow-up showed no residual or recurrent tumor. In one case, a T1 signal indicated a tumor of the upper inner auditory canal (IAC) at the MRI follow up. Conclusion: MRI follow-up as a quality control tool after ILS removal and cochlear implantation is highly important to exclude residual tumors. Long-term MRI evaluation results are needed and can be obtained under consideration of implant position, implant magnet, and MRI sequence choice. A preoperative MRI slice thickness less than 2 mm can be recommended to visualize possible modiolar and IAC expansion

Quality Control after Intracochlear Intralabyrinthine Schwannoma Resection and Cochlear Implantation

Background: The combination of intralabyrinthine schwannoma (ILS) removal and cochlear implantation is the standard of care after surgical resection for audiological rehabilitation. Intracochlear ILS is not only the most frequent tumor in this group of schwannomas, but it is also, to some degree, surgically the most challenging because of its position behind the modiolus. Recent developments in the knowledge of implant position, implant magnet choice, and magnetic resonance imaging (MRI) sequences make an MRI follow-up after surgical removal possible. Thus far, no results are known about the surgical success and residual rate of these kind of tumors. The aim of the present study was to perform an early MRI follow-up for the evaluation of residual or recurrent intracochlear ILS after surgical removal and cochlear implantation. Methods: In a retrospective study, we evaluated seven patients after an intracochlear ILS removal and single-stage cochlear implantation with a mean period of 13.4 months post surgery with a 3T T1 GAD 2 mm sequence for a residual ILS. Patients were operated on using an individualized technique concept. Results: In six out of seven cases, 3 T T1 GAD 2 mm MRI follow-up showed no residual or recurrent tumor. In one case, a T1 signal indicated a tumor of the upper inner auditory canal (IAC) at the MRI follow up. Conclusion: MRI follow-up as a quality control tool after ILS removal and cochlear implantation is highly important to exclude residual tumors. Long-term MRI evaluation results are needed and can be obtained under consideration of implant position, implant magnet, and MRI sequence choice. A preoperative MRI slice thickness less than 2 mm can be recommended to visualize possible modiolar and IAC expansion

Petrous Apex Cholesterol Granuloma Involving the Sphenoid Sinus

Korbmacher D, Lehmann M, Gehl H-B, Ebmeyer J, Sudhoff H. Petrous Apex Cholesterol Granuloma Involving the Sphenoid Sinus. Ear, Nose & Throat Journal. 2019;90(11):E23-E25

Laterality of Audiovestibular Symptoms Predicts Laterality of Endolymphatic Hydrops in Hydropic Ear Disease (Menière)

Gürkov R, Todt I, Jadeed R, Sudhoff H, Gehl H-B. Laterality of Audiovestibular Symptoms Predicts Laterality of Endolymphatic Hydrops in Hydropic Ear Disease (Menière). Otology & Neurotology. 2020;41(9):e1140-e1144

Computed Tomography Before Balloon Eustachian Tuboplasty–A True Necessity?

Abdel-Aziz T, Schröder S, Lehmann M, Gehl H-B, Ebmeyer J, Sudhoff H. Computed Tomography Before Balloon Eustachian Tuboplasty–A True Necessity? Otology & Neurotology. 2014;35(4):635-638