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Glandular Tumors of the External Auditory Canal and Middle Ear
Built from Haynes-Glasscock-Shambaugh Surgery of the Ear, Seventh Edition
What’s inside
3 sections · 91 slides
Overview
- Scope of this presentation
Glandular Tumours of the External Auditory Canal
- Origin and frequency of glandular EAC tumours
- Histological categories of ceruminous gland tumours
- Presenting symptoms
- Symptoms suggesting invasive disease
- Gross appearance and tumour size
- Age and sex distribution
- Delay in diagnosis
- The term ceruminoma
- Wetli classification of ceruminous gland tumours
- WHO classification of ceruminous gland neoplasms
- Evidence for a ceruminous gland origin
- Proposed origin of EAC pleomorphic adenoma
- Computed tomography of glandular EAC tumours
- MRI of a glandular external auditory canal tumour
- Biopsy technique for canal lesions
- Ceruminous adenoma: histology
- Immunohistochemistry of ceruminous adenoma
- Pleomorphic adenoma of the EAC: histology
- Syringocystadenoma papilliferum of the EAC
- Features favouring malignancy
- Ceruminous adenocarcinoma: histology
- Ceruminous adenocarcinoma microarchitecture and immunophenotype
- Ceruminous adenoid cystic carcinoma: histology
- Cytology and ceruminous origin in adenoid cystic carcinoma
- Ceruminous mucoepidermoid carcinoma: histology
- Surgery for benign glandular EAC tumours
- Staging borrowed from squamous cell carcinoma
- Pittsburgh staging system for external auditory meatus carcinoma
- Resection for malignancy limited to the canal
- Reconstruction after lateral temporal bone resection
- Extent of temporal bone resection: the controversy
- Anterior extension, neck disease and unresectable tumours
- Aggressive resection for adenoid cystic carcinoma
- Indications for adjuvant radiotherapy
- Radiosensitivity by subtype: unsettled
- Prognosis of benign EAC glandular tumours
- Survival in malignant glandular EAC tumours
- Poor prognostic factors
- Patterns of recurrence and metastasis
Glandular Tumours of the Middle Ear
- Historical descriptions of middle ear glandular tumours
- Shared epithelial and neuroendocrine features
- Biological behaviour of glandular middle ear tumours
- Age, sex and presenting complaint
- Symptom frequency in middle ear glandular neoplasms
- Mechanism of facial weakness
- Regional and systemic manifestations
- Computed tomography of middle ear glandular tumours
- Computed tomography of a middle ear adenoma
- Magnetic resonance imaging features
- Distinguishing paraganglioma from glandular middle ear tumours
- Differential diagnosis of a middle ear mass
- Evaluation for metastatic disease
- Theories of origin for middle ear glandular tumours
- Rarity of middle ear carcinoid
- Adenoma versus carcinoid: one entity or two
- Light microscopy of middle ear adenoma and carcinoid
- Nuclear features and the paraganglioma contrast
- Immunohistochemistry and secretory products
- Staining pattern follows architecture
- Immunostaining to exclude paraganglioma
- Aggressive subtypes and endolymphatic sac tumours
- T categories in the middle ear adenoma staging system
- Staging system for middle ear adenomas
- Staging system for middle ear adenomas (continued)
- Pictorial reference for T status in middle ear adenoma
- Prognostic significance of the staging system
- Recurrence rates by stage
- Surgical approach by extent of disease
- Tumours extending to the ear canal and gross appearance
- Management of the ossicular chain
- Facial nerve and regional disease at operation
- Adjuvant therapy for glandular middle ear tumours
- Factors influencing recurrence
- Tumour biology and recurrence
- Reported metastatic disease from middle ear carcinoid
- Surveillance after treatment
- Key points
- Key points continued
- References
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- References (continued)
- Haynes-Glasscock-Shambaugh Surgery of the Ear, Seventh Edition
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