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Glossary of ENT differentials

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What space?

DDx of lesions
Pharyngeal Mucosal space

Squamous Cell Carcinoma
Adenoid Cystic Carcinoma
Lymphoma
Juvenile Nasal Angiofibroma
Thornwaldt's Cyst

What space?

Differential?
Parapharyngeal space

* Branchial cleft cyst
* Lipoma
* Infection
* METS (squamous cell CA)
* Pleomorphic adenoma

Space?

Differential
Carotid Space

* Metastatic squamous cell CA
* Lymphoma
* Schwannoma/Neurofibroma
* Paraganglioma

Space?

Ddx?
Pre-vertebral space

METS
Chordoma
Infection

Which space is this?

What's the ddx?
Submandibular space
MALIGNANT
- Squam cell CA
- Lymphoma
- Adenoid Cystic CA
- Mucoepidermoid CA
BENIGN
- Pleomorphic adenoma
- Warthin's Tumor
- Hemangioma
- Branchial Cleft Cysts
- Epidermoid
- Ranula

Which space

What's the ddx?
Parotid space

* Pleomorphic adenoma
* Warthin's
* Mucoepidermoid CA
* Adenoid cystic CA
* Squamous cell CA
* Hemangioma

space?

differential?
Masticator space

Squamous Cell Carcinoma
Salivary Gland Tumors
Lymphoma
Hemangioma
Abscess
Rhabdomyosarcoma

Which space is this?

Differential for masses?
Retropharyngeal space

METS
Lymphomas
Infections

Lesions
by location
A: Inner Ear
- Facial Nerve Neuroma
B: Mesotympanicum
- High-riding jugular bulb
- Aberrant Carotid artery
- Glomus jugulare/tympanicum
C: Epitympanicum
- Aquired Cholesteatoma
D: Tegmen Tympani
- Fracture
- Epidermoid
- Encephalocele

Lesions
by location
A: Nonpneumatized Petrous Apex
- Cholesterol Granuloma
B: Internal Auditory Canal
- Acoustic Neuroma
- Meningioma
- Epidermoid / Arachnoid Cyst
- Metastasis
C: Middle Ear
- Mondini - incomplete devel cochlea
- Michel - single cavity vestibule, cochlea, canals

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