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Nonneoplastic Lesions of the Petrous Apex
Built from Haynes-Glasscock-Shambaugh Surgery of the Ear, Seventh Edition
What’s inside
10 sections · 86 slides
Overview
- Scope of this topic
Anatomy and clinical presentation
- Boundaries of the petrous apex
- Internal divisions and pneumatization
- Petrous apex boundaries on axial CT
- Clinical presentation of petrous apex lesions
- Otologic symptoms suggesting apex pathology
- Cranial neuropathy in petrous apex disease
- Imaging modalities for the petrous apex
- Differential diagnosis of petrous apex lesions
- Reading the signal characteristics table
- Characteristics of petrous apex lesions
Pseudolesions of the petrous apex
- Definition and frequency of pseudolesions
- Trapped effusion on imaging
- Asymmetric fatty marrow
- Asymmetric pneumatization with fatty marrow
- Trapped effusion after otitis media
- Distinguishing effusion from cholesterol granuloma
Mucocele of the petrous apex
- Pathogenesis and symptoms of mucocele
- Histology and CT appearance of mucocele
- MRI features of mucocele
- Diffusion-weighted imaging in cystic apex lesions
Cholesterol granuloma
- Pathogenesis of cholesterol granuloma
- Pathogenesis of cholesterol granuloma
- Theories of the origin of bleeding
- Incidence and presentation
- Imaging of cholesterol granuloma
- Cholesterol granuloma of the left petrous apex
- Observation of cholesterol granuloma
- Surgical management of cholesterol granuloma
Petrous apex cholesteatoma
- Origin of petrous apex cholesteatoma
- Matrix and mechanism of expansion
- Symptoms and meningitic complications
- Imaging of petrous apex cholesteatoma
- Enhancement pattern and benign bone tumours
- Cholesteatoma of the right petrous apex
- Resection and surveillance of cholesteatoma
Arachnoid cysts and cephaloceles
- Arachnoid cysts of the petrous apex
- Management of arachnoid cysts
- Cephaloceles of the petrous apex
- Imaging and management of cephalocele
- Cephalocele of the right petrous apex
Petrous apicitis
- Pathogenesis of petrous apicitis
- Progression of petrous apicitis
- Complications of petrous apicitis
- Presentation and Gradenigo's triad
- Imaging findings in petrous apicitis
- Treatment of petrous apicitis
Surgical approaches to the petrous apex
- Factors determining approach selection
- Corridors to the petrous apex
- Infralabyrinthine approach: principles
- Infralabyrinthine approach: patient selection
- Infralabyrinthine approach: operative steps
- Transcanal infracochlear approach: indications
- Transcanal infracochlear approach: pros and cons
- Transcanal infracochlear approach: operative steps
- Transarcuate approach
- Transarcuate approach: technique and limits
- Middle fossa approach: indications
- Middle fossa approach: disadvantages
- Middle fossa approach: operative steps
- Middle fossa approach: drilling and closure
- Endoscopic transsphenoidal approach: principles
- Endoscopic transsphenoidal approach: risks
- Endoscopic transsphenoidal approach: operative steps
- Subtotal petrosectomy: principles
- Subtotal petrosectomy: indications and cost
- Subtotal petrosectomy: operative steps
- Matching lesion and approach
Summary
- Key points on diagnosis
- Key points on management
- Conclusion
- References
- References (continued)
- References (continued)
- References (continued)
- Haynes-Glasscock-Shambaugh Surgery of the Ear, Seventh Edition
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